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Technical Service Information
FORD 4F27E
NEUTRAL IN 4TH "HOT"
COMPLAINT: Vehicles equipped with the 4F27E transaxle may exhibit a neutral condition in 4th gear after
the vehicle is "Hot."
CAUSE: The cause may be, the bonded solenoid gasket is leaking solenoid pressure feeding Shift
Solenoid "A." This will cause the 3-4 shift valve not to stroke fully, creating neutral.
CORRECTION: Replace the bonded solenoid gasket as shown in Figure 1. Refer to Figure 2 for the location of
the bonded gasket and Figure 3 for the remainder of the valve body assembly.
SERVICE INFORMATION:
BONDED SOLENOID GASKET (Ford Part Number)..............................YS4Z-7Z490-AA
BONDED SOLENOID GASKET
Copyright © 2005 ATSG
Figure 1
05-17
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SOLENOID BODY EXPLODED VIEW
11
12
10
9
BONDED GASKET
(SOME MODELS) 15
8 7
8
14
1 2 3
13
16
4 17
19 18
2 3
7 6
5
20
1 SHIFT SOLENOID "B" 27 LOW/REVERSE SHIFT VALVE
2 SHIFT SOLENOID "A" AND "B" LARGE "O" RING SEAL 28 LOW/REVERSE SHIFT VALVE SPRING
3 SHIFT SOLENOID "A" AND "B" SMALL "O" RING SEAL 29 VALVE LINE-UP RETAINER (7 REQUIRED)
4 SHIFT SOLENOID "A" 30 SOLENOID PRESSURE REGULATOR VALVE SPRING
5 ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID 31 SOLENOID PRESSURE REGULATOR VALVE
6 EPC SOLENOID "O" RING SEAL 32 UPPER VALVE BODY TO SPACER PLATE GASKET
7 SOLENOID RETAINING BOLTS (7 REQUIRED) 33 VALVE BODY SPACER PLATE
8 SOLENOID BODY TO LOWER V. B. ALIGNMENT DOWELS (2 REQ) 34 LOWER VALVE BODY TO SPACER PLATE GASKET
9 SOLENOID BODY TO SPACER PLATE GASKET, WITH SCREENS 35 TORQUE CONVERTER RELIEF VALVE SPRING
10 SOLENOID BODY SPACER PLATE 36 TORQUE CONVERTER RELIEF VALVE
11 SOLENOID BODY SPACER PLATE TO LOWER V. B. GASKET 37 TORQUE CONVERTER CLUTCH CONTROL VALVE SPRING
12 SPACER PLATE WITH MOLDED GASKETS (SOME MODELS) 38 TORQUE CONVERTER CLUTCH CONTROL VALVE
13 PWM SHIFT SOLENOID "C" 39 CLUTCH CONTROL VALVE SPRING
14 PWM SHIFT SOLENOID "E" 40 CLUTCH CONTROL VALVE
15 PWM SHIFT SOLENOID "D" 41 3-4 SHIFT VALVE SPRING
16 PWM SHIFT SOLENOID RETAINING PLATE 42 3-4 SHIFT VALVE
17 PWM SHIFT SOLENOID LARGE "O" RING SEAL (3 REQUIRED) 43 SHIFT SOLENOID "C" ACCUMULATOR SPRING
18 PWM SHIFT SOLENOID MEDIUM "O" RING SEAL (3 REQUIRED) 44 SHIFT SOLENOID "C" ACCUMULATOR PISTON
19 PWM SHIFT SOLENOID SMALL "O" RING SEAL (3 REQUIRED) 45 SOLENOID SHIFT VALVE
20 SOLENOID BODY TO CASE BOLTS, 71mm LENGTH (2 REQUIRED) 46 SOLENOID SHIFT VALVE SPRING
21 MANUAL SHIFT VALVE 47 MAIN PRESSURE REGULATOR VALVE
22 SOLENOID BODY RETAINING BOLTS, 59MM LENGTH (5 REQUIRED) 48 MAIN PRESSURE REGULATOR VALVE SPRING
23 UPPER VALVE BODY CASTING 49 MAIN PRESSURE REGULATOR VALVE BORE PLUG
24 VALVE BODY TO CASE SEALS (2 REQUIRED) 50 MAIN PRESSURE REGULATOR VALVE BORE PLUG RETAINER
25 UPPER V. B. TO LOWER V. B. BOLTS, 32MM LENGTH (5 REQUIRED) 51 LOWER V. B. TO UPPER V. B. ALIGNMENT DOWELS (2 REQUIRED)
26 UPPER V. B. TO LOWER V. B. BOLTS, 40MM LENGTH (9 REQUIRED) 52 LOWER VALVE BODY CASTING
Copyright © 2005 ATSG
Figure 2 05-17
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AUTOMATIC TRANSMISSION SERVICE GROUP
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UPPER AND LOWER VALVE BODY EXPLODED VIEW
26
25
24
21
24
22
27
23
29 28
31
30
29
32
33
34
29
29
35
52 36 29
51 37
38 29
51
39
40
41
50
47
42
48 43
44
49
45
46
29
Solenoid Body and
Legend Found in Figure 2
Copyright © 2005 ATSG
Figure 3 05-17
Page 3 of 3
AUTOMATIC TRANSMISSION SERVICE GROUP
