Ford 5R55W/S
TIME TESTED INDUSTRY TRUSTED
Critical Wear Areas & Vacuum Test Locations 25
20
30
15
0
10
5
Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to VACUUM
TEST
with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear.
Plug casting valley with foam, putty or appropriately sized O-ring coated in
Click on Sonnax part numbers to see more information. assembly lube to isolate circuits.
VFS1 Modulator Control Valve Boost Valve Converter Feed Limit Valve
Low line pressure Assembly Front lube failure
Pressure Regulator Valve Slipping upshifts Poor line rise Overheat and/or delayed engagement
Burned intermediate and/or low/reverse band Slipping upshifts Increased stall RPM
Delayed engagement
Replace with Sonnax Part No. Burnt bands/clutches Replace with Sonnax Part No.
Soft shifts
56947J-19K Requires F-56947J-TL19 & VB-FIX 56947J-61K Requires F-56947J-TL61 &
Insufficient line rise
VB-FIX
Erratic buzz
High/uncontrollable line pressure in reverse
Install Sonnax Part No. Solenoid Feed
56947J-09K Requires 56947J-TL9
Limit Valve
Gear ratio codes 731 to 741
Reverse Servo Control Valve
No TCC apply
No/delayed reverse Flooded solenoids
Burned low/reverse band
Replace with Sonnax Part
No.
Reverse Engagement Valve 56947J-61K
Slipping/no/delayed reverse Requires F-56947J-TL61 & VB-FIX
Burned direct clutch
Replace with Sonnax Part No.
56947J-29K Requires F-27741-TL13 & VB-FIX
VFS1 Port
Reverse Modulator Valve Low line pressure
Delayed reverse engagement Slipping shifts
Loss of 4th or 5th NOTE: Check for wear on end plugs.
Burned direct clutch
Replace with Sonnax Part No. Intermediate Servo
56947J-23K Requires F-27741-TL13 & VB-FIX Select Valve
Burned intermediate band
Direct Clutch Control Valve Burned direct clutch
Delayed reverse engagement
Loss of 4th or 5th Forward Engagement Valve
Burned direct clutch Slipping/no/delayed forward
Burned forward clutch
Intermediate Servo Replace with Sonnax Part No.
Release Valve 56947J-26K Requires F-27741-TL13 & VB-FIX
Burned intermediate band
Overdrive Servo Control Valve
VFS2 Modulator Control Valve Burned overdrive band
Low line pressure
Slipping upshifts
TCC Modulator Valve
Burned overdrive band
Codes 741 or 1783
Burned coast clutch
Transmission overheat
Replace with Sonnax Part No.
High line pressure
56947J-19K
Requires F-56947J-TL19 & VB-FIX Replace with Sonnax Part No.
56947J-15K Requires F-56947J-TL15 & VB-FIX
Coast Clutch Control Valve TCC Modulator Sleeve &
Burned coast clutch Test these Plunger Assembly
together. High TCC slip RPM at increasing load
Converter Clutch Back Slip codes
Pressure Valve Elevated fluid temperature
TCC Control Valve
Excessive TCC slip Replace with Sonnax Part No.
Excess TCC slip Restricted cooler flow
Converter codes 56947J-01K OE Ratio
TCC lining coming off Code 741
Burned converter lining 56947J-03K Increased Ratio
Overheated converters
Replace with Sonnax Part No.
56947J-05K Requires F-56947J-TL2 & VB-FIX
2014 Sonnax Industries, Inc. 5R55W-S_VacTestLocations01-06-14
800-843-2600 802-463-9722 F: 802-463-4059 www.sonnax.com Page 1
Ford 5R55W/S
TIME TESTED INDUSTRY TRUSTED
OE Exploded View
Lower Valve Body Descriptions
I.D. No. Description
TCC Control Valve (inboard)
101 Fluid Cooler Bypass
& Thermo Valve (outboard)
Converter Clutch Back Pressure
Valve (inboard)
102
Coast Clutch Control Valve
(outboard)
103 VFS2 Modulator Control Valve
104 Intermediate Servo Release Valve 109
105 Direct Clutch Control Valve
106 Reverse Modulator Valve 110
107 Reverse Engagement Valve
108 VFS1 Modulator Control Valve
Main Regulator Valve (inboard)
109
Boost Valve & Sleeve (outboard)
Solenoid Feed Limit Valve
111
(inboard)
110 108
Coverter Feed Limit Valve
(outboard)
111 Manual Valve
112 Rear Servo Control Valve
113 Intermediate Servo Select Valve
Forward Engagement
114
Control Valve
115 Overdrive Servo Control Valve
TCC Modulator Valve (inboard)
116 TCC Plunger Valve & Sleeve
(outboard)
107
106 112
105 113
104 114
103 115
102
116
101
2014 Sonnax Industries, Inc. 5R55W-S_VacTestLocations01-06-14
800-843-2600 802-463-9722 F: 802-463-4059 www.sonnax.com Page 2
