ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? 1
2
3

10
11 12
9
5

14-1
4
8
7

13

14
15

16
22
17

18

19
20
21

23

24

25

26

27

V06235
x

Figure 14–1A. Turbine Shaft And Forward Clutch

x

20010701 Copyright © 2001 General Motors Corp. 14–1–1.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? 1

2
3

13
10
11
9 12
14-1
13 5
14

15

16 4
8
7
17
18

19

20
23
24
21

22

25

26

27

28

29

V06236

Figure 14–1B. Turbine Shaft And Forward Clutch (Input Retarder)

14–1–1.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
1 Thrust Bearing Kit. Kit Contains 29503225 Roller Thrust Bearing
Assembly And 23019781 Instruction Sheet No. 196. . . . . . . . . . . 23019782 1 3 6 15
2 Sealring, Hook-Type, 1 inch OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6839163 1 2 4 12
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23015157 ** 1
4 Forward-Clutch Housing And Turbine Shaft Assembly. When
Replacing 6835752 Forward-Clutch Housing And Turbine 14-1
Shaft Assembly With 23017174 Housing And Shaft
Assembly, See SPI 5-TR-76. . . . . . . . . . . . . . . . . . . . . . . . . . 23017174 1 2 4 12
5 Sealring, Hook-Type, 15⁄8 inch OD . . . . . . . . . . . . . . . . . . . . . 6833999 2 6 12 48
6 Turbine Shaft Kit. Kit Contains 23013693 Turbine Shaft And
Instruction Sheet No. 145. . . . . . . . . . . . . . . . . . . . . . . . . 23012785 1 2 4 12
7 Housing Assembly, Forward-Clutch . . . . . . . . . . . . . . . . . . . . 23017172 * 1
8 Ball, Check, 3⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8622757 2 6 12 48
9 Pin, Spring, 1⁄8 x 7⁄ 8 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455862 1 3 6 15
10 Plug, Centrifugal Pressure Relief Valve. Color Coded Green. . . . . 23012446 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.193 ID x 0.760 inch.
Color Coded Green. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013747 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded Green. . . . . . . . . 23013746 1 3 6 15
13 Ring, Retaining, Internal, 8.966 inch OD . . . . . . . . . . . . . . . . . . . . 6838364 1 3 6 15
14 Gear, PTO Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885146 1 3 6 15
15 Sealring, External Lip-Type, 3.280 inch ID . . . . . . . . . . . . . . . . . . 23015880 1 3 6 15
16 Sealring, External Lip-Type, 6.655 inch ID . . . . . . . . . . . . . . . . . . 6833981 1 3 6 15
17 Piston, Forward-Clutch. 0.995–1.005 inch, Selective.
Identified With Letter A. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834669 AR 1 2 5
17 Piston, Forward-Clutch. 1.020–1.030 inch, Selective.
Identified With Letter B. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834668 AR 1 2 5
17 Piston, Forward-Clutch. 1.045–1.055 inch, Selective.
Identified With Letter C. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834219 AR 1 2 5
18 Spring, Forward-Clutch Piston Return . . . . . . . . . . . . . . . . . . . . . . 6836773 1 3 6 15
19 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . 6834369 1 3 6 15
20 Ring, Retaining, External, 2.550 inch ID . . . . . . . . . . . . . . . . . . . . 6885156 1 3 6 15
21 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 23015799 1 3 6 15
22 Hub, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834222 1 1 2 5
23 Plate, External-Tanged Reaction, Forward-Clutch . . . . . . . . . . . . 23016610 5 10 20 80
24 Plate, Internal-Splined Friction, Forward-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 5 15 30 120
25 Hub, Fourth-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834221 1 1 2 8
26 Ring, Retaining, Internal, 7.998 inch OD . . . . . . . . . . . . . . . . . . . . 23018867 1 3 6 18
27 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23015799 1 3 6 15

* Serviced Only As An Assembly — Not Available As A Detail Part.

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–1–2.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-694
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
14-1 12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

GROUP 14-695
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043257 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded Red. . . . . . 6882642 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.277 ID x 0.960 inch.
Color Coded Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883236 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded Red. . . . . . . . . . . 23010018 1 3 6 15

GROUP 14-696
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

** Not Serviced As An Assembly — Order Detail Parts.

14–1–2.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-697
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043258 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15 14-1
13–14 Not Used In This Group.

GROUP 14-698
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043259 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded Red. . . . . . 6882642 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.277 ID x 0.960 inch.
Color Coded Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883236 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded Red. . . . . . . . . . 23010018 1 3 6 15
13–14 Not Used In This Group.

GROUP 14-699
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043260 ** 1
13–14 Not Used In This Group.

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–1–2.3

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-700
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
14-1 12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

GROUP 14-701
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
NOTE: See SPI 5-TR-76 For Important Service Information.
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043257 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded Red. . . . . . 6882642 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.277 ID x 0.960 inch.
Color Coded Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883236 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded Red. . . . . . . . . . . 23010018 1 3 6 15

GROUP 14-702
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043258 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15
13–14 Not Used In This Group.

** Not Serviced As An Assembly — Order Detail Parts.

14–1–2.4 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-709
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043258 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15
13–14 Not Used In This Group. 14-1

GROUP 14-710
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

GROUP 14-712
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043260 ** 1
13–14 Not Used In This Group.

GROUP 14-865
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–1–2.5

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-941
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15
14-1
GROUP 14-949
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043261 ** 1
13–14 Not Used In This Group.
17 Piston, Forward-Clutch, 0.777–0.787 inch, Selective.
Identified With Letter A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885155 AR 1 2 5
17 Piston, Forward-Clutch, 0.807–0.817 inch, Selective.
Identified With Letter B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885154 AR 1 2 5
17 Piston, Forward-Clutch, 0.837–0.847 inch, Selective.
Identified With Letter C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885153 AR 1 2 5
22 Hub, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883020 1 1 2 5
23 Plate, External-Tanged Reaction, Forward-Clutch . . . . . . . . . . . . . 23016610 6 12 24 96
24 Plate, Internal-Splined Friction, Forward-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 6 18 36 144
25 Hub, Fourth-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017267 1 1 2 8

GROUP 14-965
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043262 ** 1
17 Piston, Forward-Clutch, 0.777–0.787 inch, Selective.
Identified With Letter A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885155 AR 1 2 5
17 Piston, Forward-Clutch, 0.807–0.817 inch, Selective.
Identified With Letter B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885154 AR 1 2 5
17 Piston, Forward-Clutch, 0.837–0.847 inch, Selective.
Identified With Letter C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885153 AR 1 2 5
22 Hub, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883020 1 1 2 5
23 Plate, External-Tanged Reaction, Forward-Clutch . . . . . . . . . . . . . 23016610 6 12 24 96

(continued on next page)

** Not Serviced As An Assembly — Order Detail Parts.

14–1–2.6 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-965
Turbine Shaft And Forward Clutch, Figure 14–1A
(cont’d)

With PTO
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
24 Plate, Internal-Splined Friction, Forward-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 6 18 36 144
25 Hub, Fourth-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017267 1 1 2 8

GROUP 14-1002 14-1

Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043259 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded Red. . . . . . 6882642 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.277 ID x 0.960 inch.
Color Coded Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883236 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded Red. . . . . . . . . . 23010018 1 3 6 15
13–14 Not Used In This Group.

GROUP 14-1004
Turbine Shaft And Forward Clutch, Figure 14–1A
Without PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043258 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15
13–14 Not Used In This Group.

GROUP 14-1019
Turbine Shaft And Forward Clutch, Figure 14–1A
With PTO
Same As Group 14-687, Except For Parts Listed Below.
3 Forward-Clutch And Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 23043256 ** 1
10 Plug, Centrifugal Pressure Relief Valve. Color Coded White. . . . . 6882638 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . 23010017 1 3 6 15

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–1–2.7

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-1041
Turbine Shaft And Forward Clutch, Figure 14–1B
With Input Retarder
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
1 Thrust Bearing Kit. Kit Contains 29503225 Roller Thrust Bearing
Assembly And 23019781 Instruction Sheet No. 196. . . . . . . . . . . . 23019782 1 3 6 15
2 Sealring, Hook-Type, 1 inch OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6839163 1 2 4 12
3 Housing, Input Retarder Stator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29526888 1 2 4 12
4 Forward-Clutch Housing And Turbine Shaft Assembly . . . . . . . . . . . . . 29527561 1 2 4 12
5 Sealring, Hook-Type, 15⁄8 inch OD . . . . . . . . . . . . . . . . . . . . . . . . . 6833999 2 6 12 48
6 Turbine Shaft Kit. Kit Contains 23013693 Turbine Shaft And
14-1 Instruction Sheet No. 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23012785 1 2 4 12
7 Housing Assembly, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . 29527562 * 1
8 Ball, Check, 3⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8622757 2 6 12 48
9 Pin, Spring, 1⁄8 x 7⁄ 8 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455862 1 2 4 12
10 Plug, Centrifugal Pressure Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . 29532585 1 3 6 15
11 Spring, Centrifugal Pressure Relief Valve, 0.248 ID x 0.870 inch.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882639 1 3 6 15
12 Valve, Centrifugal Pressure Relief. Color Coded White. . . . . . . . . . . . . 23010017 1 3 6 15
13 Sealring, Hook-Type 8.188 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29527560 2 6 12 48
14 Insert, Input Retarder Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29526889 1 2 4 12
15 Housing, Input Retarder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29526891 1 2 4 12
16 Bolt, 1⁄4-20 x 11⁄4 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186601 4 8 16 32
17 Sealring, External Lip-Type, 3.280 inch ID . . . . . . . . . . . . . . . . . . . . . . 23015880 1 3 6 15
18 Sealring, External Lip-Type, 6.655 inch ID . . . . . . . . . . . . . . . . . . . . . . 6833981 1 3 6 15
19 Piston, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6885154 1 1 2 5
20 Spring, Forward-Clutch Piston Return . . . . . . . . . . . . . . . . . . . . . . . . . . 6836773 1 3 6 15
21 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . . . . . 6834369 1 3 6 15
22 Ring, Retaining, External, 2.550 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6885156 1 3 6 15
23 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23015799 1 3 6 15
24 Hub, Forward-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883020 1 1 2 5
25 Plate, External-Tanged Reaction, Forward-Clutch . . . . . . . . . . . . . . . . 23016610 6 12 24 48
26 Plate, Internal-Splined Friction, Forward-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . . . . . 23042200 6 12 24 48
27 Hub, Fourth-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834221 1 1 2 8
28 Ring, Retaining, Internal, 7.998 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 23018867 1 2 4 12
29 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23015799 1 3 6 15

* Serviced Only As An Assembly — Not Available As A Detail Part.

14–1–2.8 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

42
41

43

14-2

44

45 50

46
47
48

49
51

52 53

54

55
56

57

58

V06237

Figure 14–2. Fourth Clutch

14–2–1.1 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Fourth Clutch, Figure 14–2
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043249 ** 1
42 Ring, Retaining, Internal, 7.998 inch OD . . . . . . . . . . . . . . . . . . . . 23018867 1 3 6 18
43 Backplate, Fourth-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29516333 1 3 6 18
44 Plate, Internal-Splined Friction, Fourth-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 4 8 16 64
45 Plate, External-Tanged Reaction, Fourth-Clutch . . . . . . . . . . . . . . 23016610 4 12 24 96
46 Ring, Retaining, External, 2.550 inch ID . . . . . . . . . . . . . . . . . . . . 6885156 1 3 6 18
47 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . 6834369 1 2 4 12
48 Spring, Fourth-Clutch Piston Return . . . . . . . . . . . . . . . . . . . . . . . 6836773 1 3 6 15
49 Piston, Fourth-Clutch, 0.995–1.005 inch, Selective.
Identified With Letter A. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834669 AR 1 2 5 14-2
49 Piston, Fourth-Clutch, 1.020–1.030 inch, Selective.
Identified With Letter B. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834668 AR 1 2 5
49 Piston, Fourth-Clutch, 1.045–1.055 inch, Selective.
Identified With Letter C. See SPI 5-TR-92. . . . . . . . . . . . . . . . 6834219 AR 1 2 5
50 Not Used In This Group.
51 Sealring, External Lip-Type, 6.655 inch ID . . . . . . . . . . . . . . . . . . 6833981 1 3 6 15
52 Sealring, External Lip-Type, 3.280 inch ID . . . . . . . . . . . . . . . . . . 23015880 1 3 6 15
53 Fourth-Clutch Housing Assembly. See SPI 60-TR-80. . . . . . . . . . 23011825 1 1 2 6
54 Ring, Reinforcing, Clutch Housing . . . . . . . . . . . . . . . . . . . . . 23046613 1 1 2 3
55 Housing Assembly, Fourth-Clutch. See SPI 33-TR-96. . . . . . 6834368 * 1
56 Ball, Check, 3⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8622757 4 4 8 15
57 Housing, Fourth-Clutch Piston . . . . . . . . . . . . . . . . . . . . . 6834223 * 1
58 Thrust Bearing Kit. Kit Contains 29503225 Roller Thrust Bearing
Assembly And 23019781 Instruction Sheet No. 196.
See SPI 33-TR-83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23019782 1 3 6 15

GROUP 14-694
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-695
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

* Serviced Only As An Assembly — Not Available As A Detail Part.

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–2–2.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-696
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-697
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

14-2
GROUP 14-698
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-699
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-700
Fourth Clutch, Figure 14–2
Same As Group 14-687.

GROUP 14-701
Fourth Clutch, Figure 14–2
Same As Group 14-687.

GROUP 14-702
Fourth Clutch, Figure 14–2
Same As Group 14-687.

** Not Serviced As An Assembly — Order Detail Parts.

14–2–2.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-709
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-710
Fourth Clutch, Figure 14–2
Same As Group 14-687.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

14-2
GROUP 14-712
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-865
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

GROUP 14-941
Fourth Clutch, Figure 14–2
Same As Group 14-687.

GROUP 14-949
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043251 ** 1
44 Plate, Internal-Splined Friction, Fourth-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 5 10 20 80
45 Plate, External-Tanged Reaction, Fourth-Clutch . . . . . . . . . . . . . . 23016610 5 15 30 120
49 Not Used In This Group.
50 Piston, Fourth-Clutch, 0.970–0.980 inch, Selective.
Identified With Letter J. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017260 AR 1 2 5
50 Piston, Fourth-Clutch, 0.995–1.005 inch, Selective.
Identified With Letter K. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017261 AR 1 2 5
(continued on next page)

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–2–2.3

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-949
Fourth Clutch, Figure 14–2
(cont’d)

Same As Group 14-687, Except For Parts Listed Below.

RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
50 Piston, Fourth-Clutch, 1.020–1.030 inch, Selective.
Identified With Letter L. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017262 AR 1 2 5
53 Fourth-Clutch Housing Assembly. See SPI 60-TR-80. . . . . . . . . . 23017257 1 1 2 6
55 Housing Assembly, Fourth-Clutch. See SPI 33-TR-96. . . . . . 23018341 * 1
57 Housing, Fourth-Clutch Piston . . . . . . . . . . . . . . . . . . . . . 23018342 * 1

GROUP 14-965
14-2 Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043251 ** 1
44 Plate, Internal-Splined Friction, Fourth-Clutch. Do Not Mix
6834370 Plate With 23042200 Plate. . . . . . . . . . . . . . . . . . . . 23042200 5 10 20 80
45 Plate, External-Tanged Reaction, Fourth-Clutch . . . . . . . . . . . . . . 23016610 5 15 30 120
49 Not Used In This Group.
50 Piston, Fourth-Clutch, 0.970–0.980 inch, Selective.
Identified With Letter J. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017260 AR 1 2 5
50 Piston, Fourth-Clutch, 0.995–1.005 inch, Selective.
Identified With Letter K. . . . . . . . . . . . . . . . . . . . . . . . . . . 23017261 AR 1 2 5
50 Piston, Fourth-Clutch, 1.020–1.030 inch, Selective.
Identified With Letter L. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23017262 AR 1 2 5
53 Fourth-Clutch Housing Assembly. See SPI 60-TR-80. . . . . . . . . . 23017257 1 1 2 6
55 Housing Assembly, Fourth-Clutch. See SPI 33-TR-96. . . . . . 23018341 * 1
57 Housing, Fourth-Clutch Piston . . . . . . . . . . . . . . . . . . . . . . . . 23018342 * 1

GROUP 14-1002
Fourth Clutch, Figure 14–2
Same As Group 14-687.

GROUP 14-1004
Fourth Clutch, Figure 14–2
Same As Group 14-687.

* Serviced Only As An Assembly — Not Available As A Detail Part.

** Not Serviced As An Assembly — Order Detail Parts.

14–2–2.4 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-1019
Fourth Clutch, Figure 14–2
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-1041
Fourth Clutch, Figure 14–2
Same As Group 14-687, Except For Parts Listed Below.
41 Fourth-Clutch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23043248 ** 1

14-2

** Not Serviced As An Assembly — Order Detail Parts.

20010701 Copyright © 2001 General Motors Corp. 14–2–2.5

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

71

72

73

14-3 74

100
80 75
99
81 76
77
82 78
79
84 83
85
86

87
88

89
90
94
91
93

95

92

96

97

98
V06238

Figure 14–3. Third Clutch, Center Support, And Second Clutch

14–3–1.1 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Third Clutch, Center Support, And Second Clutch, Figure 14–3
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
71 Ring, Retaining, Internal, 11.640 inch OD . . . . . . . . . . . . . . . . . . . . . . . 6836267 1 3 6 15
72 Backplate, Third-Clutch, 0.476–0.486 inch, Selective. Identified
With No. 7. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046745 AR 2 4 12
72 Backplate, Third-Clutch, 0.450–0.460 inch, Selective. Identified
With No. 8. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046746 AR 2 4 12
72 Backplate, Third-Clutch, 0.463–0.473 inch, Selective. Identified
With No. 9. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046718 AR 2 4 12
73 Plate, Internal-Splined Friction, Third-Clutch. Do Not Mix
6835720 Plate With 23042201 Plate. . . . . . . . . . . . . . . . . . . . . . . 23042201 3 9 18 72
74 Plate, External-Tanged Reaction, Third-Clutch . . . . . . . . . . . . . . . . . . . 23016608 3 9 18 72
75 Ring, Retaining, Internal, 0.148–0.150 inch, Selective.
Color Coded White. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6836265 AR 1 2 8
75 Ring, Retaining, Internal, 0.152–0.154 inch, Selective. 14-3
Color Coded Yellow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6836266 AR 1 2 8
75 Ring, Retaining, Internal, 0.155–0.157 inch, Selective.
Color Coded Green. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6836267 AR 1 2 8
75 Ring, Retaining, Internal, 0.158–0.160 inch, Selective.
Color Coded Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6836268 AR 1 2 8
76 Nut, Push-On, 1⁄4 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3909063 4 8 16 48
77 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . . . . 6834354 1 3 6 15
78 Spring, Third-Clutch Piston Return, 0.385 OD x 1.290 inch . . . . . . . . . 6831656 20 40 80 320
79 Piston, Third-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834230 1 2 4 8
80 Sealring, Internal Lip-Type, 8.575 inch OD . . . . . . . . . . . . . . . . . . . . . . 23011471 1 3 6 15
81 Sealring, External Lip-Type, 9.949 inch ID . . . . . . . . . . . . . . . . . . . . . . 6883035 1 3 6 15
82 Sealring Kit. Kit Contains Four 23015617 Butt-Joint Sealrings,
2.960 inch OD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23014632 1 2 4 8
83 Center Support And Bushing Assembly. When Replacing
23017362 Center Support Assembly With 23018593 Center
Support Assembly, Also Replace 23013398 Center Support
Anchor Bolt With 23045343 Bolt And 23014094 Washer With
23013841 Hardened Washer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018593 1 1 2 8
84 Bushing, 2.066 ID x 2.254 OD x 2.410 inch . . . . . . . . . . . . . . . . . . 23011924 1 3 6 15
85 Ball, Check, 5⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453570 1 3 6 15
86 Support, Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018948 * 1
87 Sealring, External Lip-Type, 9.949 inch ID . . . . . . . . . . . . . . . . . . . . . . 6883035 1 3 6 15
88 Sealring, Internal Lip-Type, 8.575 inch OD . . . . . . . . . . . . . . . . . . . . . . 23011471 1 3 6 15
89 Piston, Second-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834230 1 2 4 8
90 Spring, Second-Clutch Piston Return, 0.385 OD x 1.290 inch . . . . . . . 6831656 20 40 80 320
91 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . . . . 6834354 1 3 6 15
92 Nut, Push-On, 1⁄4 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3909063 4 8 16 48
93 Filter, Oil. Used Starting With S/N 100432. . . . . . . . . . . . . . . . . . . . . . . 23010654 1 3 6 15
94 O-ring, 0.420 inch ID. Used Starting With S/N 100432. . . . . . . . . . . . . 6761244 1 3 6 15
95 Ring, Retaining, Internal, 11.640 inch OD . . . . . . . . . . . . . . . . . . . . . . . 6836267 1 1 2 8
96 Plate, External-Tanged Reaction, Second-Clutch . . . . . . . . . . . . . . . . . 23016608 3 9 18 72

(continued on next page)

* Serviced Only As An Assembly — Not Available As A Detail Part.

20010701 Copyright © 2001 General Motors Corp. 14–3–2.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Third Clutch, Center Support, And Second Clutch, Figure 14–3
(cont’d)

RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
97 Plate, Internal-Splined Friction, Second-Clutch. Do Not Mix
6835720 Plate With 23042201 Plate. . . . . . . . . . . . . . . . . . . . . . . . 23042201 3 9 18 72
98 Backplate, Second-Clutch, 0.476–0.486 inch, Selective. Identified
With No. 7. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046745 AR 2 4 12
98 Backplate, Second-Clutch, 0.450–0.460 inch, Selective. Identified
With No. 8. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046746 AR 2 4 12
99 Bolt, 3⁄8-16 x 21⁄4 inch. Center Support Anchor. Used Prior To
23018593 Center Support Assembly. . . . . . . . . . . . . . . . . . . . . . . 23013398 1 2 4 12
99 Bolt, Patchlock, 12 Point Head, 3⁄8-16 x 3 inch. Center Support
Anchor. Used Starting With 23018593 Center Support
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045343 1 2 4 12
100 Washer, Flat, 3⁄8 inch. Used Prior To 23018593 Center Support
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23014094 1 2 4 12
14-3
100 Washer, Flat, Hardened, 3⁄8 inch. Used Starting With 23018593 Center
Support Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013841 1 2 4 12

GROUP 14-694
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-695
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-696
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687, Except For Parts Listed Below.
78 Spring, Third-Clutch Piston Return, 0.359 OD x 1.307 inch . . . . . . . . . 23011242 20 40 80 320
90 Spring, Second-Clutch Piston Return, 0.359 OD x 1.307 inch . . . . . . . 23011242 20 40 80 320

GROUP 14-697
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

14–3–2.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-698
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-699
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-700
14-3
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-701
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-702
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-709
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-710
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

20010701 Copyright © 2001 General Motors Corp. 14–3–2.3

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-712
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-865
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687, Except For Parts Listed Below.
78 Spring, Third-Clutch Piston Return, 0.359 OD x 1.307 inch . . . . . . . . . 23011242 20 40 80 320
90 Spring, Second-Clutch Piston Return, 0.359 OD x 1.307 inch . . . . . . . 23011242 20 40 80 320

14-3 GROUP 14-941

Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-949
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-965
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-1002
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

14–3–2.4 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-1004
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-1019
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687.

GROUP 14-1041
14-3
Third Clutch, Center Support, And Second Clutch, Figure 14–3
Same As Group 14-687, Except For Parts Listed Below.
96 Plate, External-Tanged Reaction, Second-Clutch . . . . . . . . . . . . . . . . . 23016608 4 9 18 72
97 Plate, Internal-Splined Friction, Second-Clutch . . . . . . . . . . . . . . . . . . 23042201 4 9 18 72
98 Backplate, Second-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046747 AR 2 4 12

20010701 Copyright © 2001 General Motors Corp. 14–3–2.5

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

?
127
126

115
116 120
111
112 117
118 119 128
113 117
116 121
114 128
129
130
122 132 131
123
129
125
124 132

133

134 14-4
141 135
142 136
137

143
144 136
138
139 140
145

146
147

148
149

158
157

151
159
160
150 161
162
163
152 156 164
153
154
155
153

152

V04480

Figure 14–4A. Gear Unit And Main Shaft (MT 640, 643)

20010701 Copyright © 2001 General Motors Corp. 14–4–1.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? 126 127

115
111 116 120
112 117
118 119 128
113 117
116 121
114
128
129
132 130
122 123 131
129
125
124 132

133

134

141 135
142 136
137
14-4
143
144 136
138
139 140
145

146

147

156
159

160 157

158
148

161 165 149 155

162
163 150
164
162

161

166

151
166 152
153
154
152 151
V04481

Figure 14–4B. Gear Unit And Main Shaft (MT 650, 653)

14–4–1.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Gear Unit And Main Shaft, Figure 14–4A
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
111 Washer, Thrust, 2.077 ID x 2.700 inch OD . . . . . . . . . . . . . . . . . . . . . . 6839364 1 3 6 15
112 Gear, Front Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835574 1 1 2 4
113 Washer, Thrust, 2.526 ID x 2.900 inch OD . . . . . . . . . . . . . . . . . . . . . . 6835386 1 3 6 15
114 Carrier Assembly, Front Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882565 1 1 2 8
115 Pin, Front Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834309 6 12 24 96
116 Washer, Pinion Thrust, Bronze, 0.518 inch ID . . . . . . . . . . . . . . . . 6839514 12 24 48 196
117 Washer, Pinion Thrust, Steel, 0.515 inch ID . . . . . . . . . . . . . . . . . 6833991 12 24 48 196
118 Gear Set, Front Planetary Pinion. Set Contains Six
6834310 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 23045484 1 1 2 8
119 Bearing, Roller, 0.0937 x 0.800 inch . . . . . . . . . . . . . . . . . . . . . . . 9426919 120 120 240 480
120 Flange And Carrier Assembly, Front Planetary . . . . . . . . . . . . . . . 6882564 1 1 2 8
121 Bushing, 2.558 ID x 2.628 OD x 0.438 inch . . . . . . . . . . . . . . . 6835385 1 3 6 15
122 Washer, Thrust, 2.919 ID x 33⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834389 1 3 6 15
123 Ring, Retaining, Internal, 7.628 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834512 1 3 6 15
124 Gear, Front Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045281 1 1 2 4 14-4
125 Carrier Assembly, Center Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045604 1 1 2 4
126 Pin, Center Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 4 8 12 48
127 Carrier, Center Planetary. When Replacing 6835563 Center
Planetary Carrier With 29509944 Carrier, Also Replace
6839375 Pinion Thrust Washers With 29505505 Two-Pinion
Thrust Washers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29509944 1 3 6 15
128 Washer, Pinion Thrust, Bronze, 0.755 inch ID. Used With
6835563 Center Planetary Carrier Only. . . . . . . . . . . . . . . . . 6839375 8 16 32 64
129 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 8 16 32 64
130 Gear Set, Center Planetary Pinion. Set Contains Four
6835566 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 6882804 1 1 2 8
131 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 72 72 144 288
132 Washer, Two-Pinion Thrust, Bronze. Used Starting With
23045605 Center Planetary Carrier. . . . . . . . . . . . . . . . . . . . . 29505505 4 8 12 48
133 Shaft Assembly, Center Planetary Sun Gear . . . . . . . . . . . . . . . . . . . . 29516215 1
134 Pin, Spring, 0.261 x 5⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834940 2 4 8 15
135 Shaft And Bushing Assembly, Center Planetary Sun Gear . . . . . . 29516214 * 1
136 Bushing, 1.566 ID x 1.691 OD x 1⁄ 2 inch . . . . . . . . . . . . . . . . . 29516211 2 4 8 15
137 Shaft, Center Planetary Sun Gear . . . . . . . . . . . . . . . . . . . . . 29516837 * 1
138 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9432513 1 3 6 15
139 Race, Roller Thrust Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9432512 1 3 6 15
140 Drum, Planetary Connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835570 1 1 2 4
141 Ring, Retaining, External, 2.104 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6769319 1 3 6 15
142 Gear, Center Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29523159 1 1 2 4
143 Shaft Assembly, Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013456 1 1 2 4
144 Plug, 0.120 inch Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883707 1 2 4 12
145 Shaft, Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013440 * 1
146 Washer, Thrust, 0.781 ID x 11⁄ 4 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . 29524362 1 3 6 15
147 Gear, Rear Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883901 1 1 2 4
148 Ring, Retaining, External, 1.214 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6834583 1 3 6 15

(continued on next page)

* Serviced Only As An Assembly — Not Available As A Detail Part.

20010701 Copyright © 2001 General Motors Corp. 14–4–2.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
Gear Unit And Main Shaft, Figure 14–4A
(cont’d)

RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
149 Ring, Retaining, External, 1.535 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6836599 1 3 6 15
150 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835564 1 1 2 6
151 Pin, Rear Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 4 8 12 48
152 Washer, Two-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . . 29505505 4 8 16 32
153 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 8 16 32 64
154 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 72 72 144 288
155 Gear Set, Rear Planetary Pinion. Set Contains Four
6835566 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 6882804 1 1 02 8
156 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835565 1 3 6 15
157 Not Used In This Group.
158 Ring, Retaining, Internal, 7.628 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834512 1 3 6 15
159 Bearing Assembly, Single-Row Ball . . . . . . . . . . . . . . . . . . . . . . . . . . . 23047959 1 3 6 18
160 Shaft Assembly, Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23016857 1 1 2 4
161 Bushing, 0.743 ID x 0.816 OD x 0.428 inch . . . . . . . . . . . . . . . . . . 23016859 1 3 6 15
162 Plug, 0.062 inch Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29508031 1 2 4 12
14-4 163 Pin, Spring, 0.196 x 3⁄4 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454512 1 2 4 12
164 Shaft, Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6837627 * 1

GROUP 14-694
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

GROUP 14-695
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

GROUP 14-696
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

GROUP 14-697
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

* Serviced Only As An Assembly — Not Available As A Detail Part.

14–4–2.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-698
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-699
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

GROUP 14-700
Gear Unit And Main Shaft, Figure 14–4B
111 Washer, Thrust, 2.077 ID x 2.700 inch OD . . . . . . . . . . . . . . . . . . . . . . 6839364 1 3 6 15 14-4
112 Gear, Front Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835574 1 1 2 4
113 Washer, Thrust, 2.526 ID x 2.900 inch OD . . . . . . . . . . . . . . . . . . . . . . 6835386 1 3 6 15
114 Carrier Assembly, Front Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882565 1 1 2 8
115 Pin, Front Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834309 6 12 24 96
116 Washer, Pinion Thrust, Bronze, 0.518 inch ID . . . . . . . . . . . . . . . . 6839514 12 24 48 196
117 Washer, Pinion Thrust, Steel, 0.515 inch ID . . . . . . . . . . . . . . . . . 6833991 12 24 48 196
118 Gear Set, Front Planetary Pinion. Set Contains Six
6834310 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 23045484 1 1 2 8
119 Bearing, Roller, 0.0937 x 0.800 inch . . . . . . . . . . . . . . . . . . . . . . . 9426919 120 120 240 480
120 Flange And Carrier Assembly, Front Planetary . . . . . . . . . . . . . . . 6882564 1 1 2 8
121 Bushing, 2.558 ID x 2.628 OD x 0.438 inch . . . . . . . . . . . . . . . 6835385 1 3 6 15
122 Washer, Thrust, 2.919 ID x 33⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834389 1 3 6 15
123 Ring, Retaining, Internal, 7.628 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834512 1 3 6 15
124 Gear, Front Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045281 1 1 2 4
125 Carrier Assembly, Center Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045604 1 1 2 4
126 Pin, Center Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 4 8 12 48
127 Carrier, Center Planetary. When Replacing 6835563 Center
Planetary Carrier With 29509944 Carrier, Also Replace
6839375 Pinion Thrust Washers With 29505505 Two-Pinion
Thrust Washers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29509944 1 3 6 15
128 Washer, Pinion Thrust, Bronze, 0.755 inch ID. Used With
6835563 Center Planetary Carrier Only. . . . . . . . . . . . . . . . . 6839375 8 16 32 64
129 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 8 16 32 64
130 Gear Set, Center Planetary Pinion. Set Contains Four
6835566 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 6882804 1 1 2 8
131 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 72 72 144 288
132 Washer, Two-Pinion Thrust, Bronze. Used Starting With
23045605 Center Planetary Carrier. . . . . . . . . . . . . . . . . . . . . 29505505 4 8 12 48
133 Shaft Assembly, Center Planetary Sun Gear . . . . . . . . . . . . . . . . . . . . 29516215 1
134 Pin, Spring, 0.261 x 5⁄16 inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834940 2 4 8 15

(continued on next page)

20010701 Copyright © 2001 General Motors Corp. 14–4–2.3

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-700
Gear Unit And Main Shaft, Figure 14–4B
(cont’d)

RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
135 Shaft And Bushing Assembly, Center Planetary Sun Gear . . . . . . 29516214 * 1
136 Bushing, 1.566 ID x 1.691 OD x 1⁄ 2 inch . . . . . . . . . . . . . . . . . 29516211 2 4 8 15
137 Shaft, Center Planetary Sun Gear . . . . . . . . . . . . . . . . . . . . . 29516837 * 1
138 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9432513 1 3 6 15
139 Race, Roller Thrust Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9432512 1 3 6 15
140 Drum, Planetary Connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835570 1 1 2 4
141 Ring, Retaining, External, 2.104 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6769319 1 3 6 15
142 Gear, Center Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29523159 1 1 2 4
143 Shaft Assembly, Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013456 1 1 2 4
144 Plug, 0.120 inch Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883707 1 2 4 12
145 Shaft, Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23013440 * 1
146 Gear, Rear Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6883901 1 1 2 4
147 Ring, Retaining, External . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834583 1 3 6 15
148 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835642 1 1 2 6
149 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 2 4 10
14-4
150 Pin, Rear Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 4 8 16 32
151 Washer, Two-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . . 29505505 4 8 16 32
152 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 8 16 32 64
153 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 72 72 144 288
154 Gear Set, Rear Planetary Pinion. Set Contains Four
6835566 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . . 6882804 1 1 2 8
155 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835643 1 3 6 15
156 Ring, Retaining, Internal, 7.628 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6834512 1 3 6 15
157 Washer, Thrust, 2.526 ID x 2.900 inch OD . . . . . . . . . . . . . . . . . . . . . . 6835386 1 2 4 15
158–166 Not Used In This Group.

GROUP 14-701
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700.

GROUP 14-702
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700, Except For Parts Listed Below.
146 Gear, Rear Planetary Sun. Used Prior To S/N 2410262943. . . . . . . . . 6883901 1 1 2 4
146 Gear, Rear Planetary Sun. Used Starting With S/N 2410262943. . . . . 23045307 1 1 2 4
148 Carrier Assembly, Rear Planetary. Used Prior To S/N 2410262943. . . 6835642 1 1 2 6
149 Bearing Assembly, Roller Thrust. Used Prior To
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
150 Pin, Rear Planetary Pinion. Used Prior To S/N 2410262943. . . . . 6835567 4 8 16 32

(continued on next page)

* Serviced Only As An Assembly — Not Available As A Detail Part.

14–4–2.4 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-702
Gear Unit And Main Shaft, Figure 14–4B
(cont’d)

Same As Group 14-700, Except For Parts Listed Below.

RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
151 Washer, Two-Pinion Thrust, Bronze. Used Prior To
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29505505 4 8 16 32
152 Washer, Pinion Thrust, Steel, 3⁄4 inch ID. Used Prior To
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018960 8 16 32 64
153 Bearing, Roller, 0.1561 x 1.420 inch. Used Prior To
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834915 72 72 144 288
154 Gear Set, Rear Planetary Pinion. Set Contains Four
6835566 Planetary Pinion Gears. Used Prior To
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6882804 1 1 2 8
155 Carrier, Rear Planetary. Used Prior To S/N 2410262943. . . . . . . . 6835643 1 3 6 15
158 Carrier Assembly, Rear Planetary. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018941 1 1 2 6
159 Bearing Assembly, Roller Thrust. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15 14-4
160 Pin, Rear Planetary Pinion. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 5 10 20 40
161 Washer, Two-Pinion Thrust, Bronze. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29505506 2 4 8 16
162 Washer, Pinion Thrust, Steel, 3⁄4 inch ID. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018960 10 20 40 80
163 Bearing, Roller, 0.1561 x 1.420 inch. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6834915 90 90 180 360
164 Gear Set, Rear Planetary Pinion. Set Contains Five
23045306 Planetary Pinion Gears. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23041261 1 1 2 8
165 Carrier, Rear Planetary. Used Starting With S/N 2410262943. . . . 23018812 1 3 6 15
166 Washer, Three-Pinion Thrust, Bronze. Used Starting With
S/N 2410262943. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29505507 2 4 8 32

GROUP 14-709
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687, Except For Parts Listed Below.
146 Not Used In This Group.
149 Not Used In This Group.
150 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835642 1 1 2 6
156 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835643 1 3 6 15
157 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
159–164 Not Used In This Group.

20010701 Copyright © 2001 General Motors Corp. 14–4–2.5

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-710
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
146 Not Used In This Group.
149 Not Used In This Group.
150 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835642 1 1 2 6
156 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835643 1 3 6 15
157 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
159–164 Not Used In This Group.

GROUP 14-712
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687, Except For Parts Listed Below.
146 Not Used In This Group.
14-4 149 Not Used In This Group.
150 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835642 1 1 2 6
156 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835643 1 3 6 15
157 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
159–164 Not Used In This Group.

GROUP 14-865
Gear Unit And Main Shaft, Figure 14–4A
Same As Group 14-687.

GROUP 14-941
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700, Except For Parts Listed Below.
146 Gear, Rear Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045307 1 1 2 4
148–155 Not Used In This Group.
158 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018941 1 1 2 6
159 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
160 Pin, Rear Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 5 10 20 40
161 Washer, Two-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . . 29505506 2 4 8 16
162 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 10 20 40 80
163 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 90 90 180 360
164 Gear Set, Rear Planetary Pinion. Set Contains Five
23045306 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . 23041261 1 1 2 8
165 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018812 1 3 6 15
166 Washer, Three-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . 29505507 2 4 8 32

14–4–2.6 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-949
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
146 Gear, Rear Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045307 1 1 1 2
148–155 Not Used In This Group.
157 Washer, Thrust, 2.526 ID x 2.900 inch OD . . . . . . . . . . . . . . . . . . . . . . 23046615 1 2 4 15
158 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018941 1 1 2 6
159 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
160 Pin, Rear Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 5 10 20 40
161 Washer, Two-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . . 29505506 2 4 8 16
162 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 10 20 40 80
163 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 90 90 180 360
164 Gear Set, Rear Planetary Pinion. Set Contains Five
23045306 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . 23041261 1 1 2 8
165 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018812 1 3 6 15
166 Washer, Three-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . 29505507 2 4 8 32
14-4
GROUP 14-965
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700, Except For Parts Listed Below.
146 Gear, Rear Planetary Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23045307 1 1 1 2
148–155 Not Used In This Group.
157 Washer, Thrust, 2.526 ID x 2.900 inch OD . . . . . . . . . . . . . . . . . . . . . . 23046615 1 2 4 15
158 Carrier Assembly, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018941 1 1 2 6
159 Bearing Assembly, Roller Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . 9434057 1 3 6 15
160 Pin, Rear Planetary Pinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835567 5 10 20 40
161 Washer, Two-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . . 29505506 2 4 8 16
162 Washer, Pinion Thrust, Steel, 3⁄4 inch ID . . . . . . . . . . . . . . . . . . . . 23018960 10 20 40 80
163 Bearing, Roller, 0.1561 x 1.420 inch . . . . . . . . . . . . . . . . . . . . . . . 6834915 90 90 180 360
164 Gear Set, Rear Planetary Pinion. Set Contains Five
23045306 Planetary Pinion Gears. . . . . . . . . . . . . . . . . . . . . . 23041261 1 1 2 8
165 Carrier, Rear Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23018812 1 3 6 15
166 Washer, Three-Pinion Thrust, Bronze . . . . . . . . . . . . . . . . . . . . . . 29505507 2 4 8 32

GROUP 14-1002
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700.

20010701 Copyright © 2001 General Motors Corp. 14–4–2.7

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-1004
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-1019
Gear Unit And Main Shaft, Figure 14–4B
Same As Group 14-700.

GROUP 14-1041
Gear Unit And Main Shaft, Figure 14–4A
14-4 Same As Group 14-687.

14–4–2.8 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? 181

182

183

184

185

14-5 186

187

183
184

188
189 191
190

192

194
193
195

V04482.01

Figure 14–5. First And Reverse Clutch

14–5–1.1 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-687
First And Reverse Clutch, Figure 14–5
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
181 Ring, Retaining, Internal, 10.011 inch OD . . . . . . . . . . . . . . . . . . . . . . . 6884275 1 3 6 15
182 Backplate, First-Clutch, 0.702–0.712 inch, Selective.
Identified With No. 4. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . 29518131 AR 2 4 12
182 Backplate, First-Clutch, 0.671–0.681 inch, Selective.
Identified With No. 5. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . 29518132 AR 2 4 12
182 Backplate, First-Clutch, 0.640–0.650 inch, Selective.
Identified With No. 6. See SPI 6-TR-86. . . . . . . . . . . . . . . . . . . . . 29518133 AR 2 4 12
183 Plate, Internal-Splined Friction, First-Clutch. See SPI 17-TR-97. . . . . . 29537887 6 12 24 96
184 Plate, External-Tanged Reaction, First-Clutch . . . . . . . . . . . . . . . . . . . 23016606 6 12 24 96
185–187 Not Used In This Group.
188 Ring, Retaining, External, 4.094 inch ID . . . . . . . . . . . . . . . . . . . . . . . . 6833993 1 3 6 15
189 Retainer, Clutch Piston Return Spring . . . . . . . . . . . . . . . . . . . . . . . . . 6834339 1 3 6 15
190 Spring, First-Clutch Piston Return, 0.455 OD x 1.280 inch . . . . . . . . . . 6880251 26 52 104 416
191 Piston, First-Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23046942 1 2 4 12
192 Sealring, External Lip-Type, 8.729 inch ID . . . . . . . . . . . . . . . . . . . . . . 6883033 1 3 6 15
193 Sealring, Internal Lip-Type, 4.677 inch OD . . . . . . . . . . . . . . . . . . . . . . 6883031 1 3 6 15
194 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835568 1 1 2 6
195 Not Used In This Group.
14-5

GROUP 14-694
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

GROUP 14-695
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

GROUP 14-696
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

20010701 Copyright © 2001 General Motors Corp. 14–5–2.1

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-697
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200

GROUP 14-698
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

GROUP 14-699
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

14-5
GROUP 14-700
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.

185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6

186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-701
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

14–5–2.2 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-702
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-709
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
188–193 Not Used In This Group.

GROUP 14-710
First And Reverse Clutch, Figure 14–5 14-5
Same As Group 14-687, Except For Parts Listed Below.
188–193 Not Used In This Group.

GROUP 14-712
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
188–193 Not Used In This Group.

GROUP 14-865
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

GROUP 14-941
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

20010701 Copyright © 2001 General Motors Corp. 14–5–2.3

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-949
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-965
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
14-5 195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-1002
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-1004
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

14–5–2.4 Copyright © 2001 General Motors Corp. 20010701

 ALLISON MT(B) 640, 643, 650, 653 SERIES ON-HIGHWAY TRANSMISSIONS PARTS CATALOG

? GROUP 14-1019
First And Reverse Clutch, Figure 14–5
Same As Group 14-687, Except For Parts Listed Below.
RECOMMENDED
REF PART SPARES FOR UNITS
NO. NOMENCLATURE NO. REQ 1–25 26–50 51–200
185 Gear, Rear Planetary Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6835641 1 1 2 6
186 Hub, Rear Planetary Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29506325 1 1 2 6
187 Ring, Retaining, Internal, 6.593 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6755007 1 3 6 15
194 Not Used In This Group.
195 Washer, Thrust, 3.720 ID x 41⁄4 inch OD . . . . . . . . . . . . . . . . . . . . . . . . 6839386 1 3 6 15

GROUP 14-1041
First And Reverse Clutch, Figure 14–5
Same As Group 14-687.

14-5

20010701 Copyright © 2001 General Motors Corp. 14–5–2.5