2013 Sonnax Industries, Inc. 5R55W-S_VacTestLocations
02-28-13
800-843-2600 802-463-9722 F: 802-463-4059 www.sonnax.com Page
1
Ford 5r55W/STIME TESTED INDUSTRY TRUSTED
Click on Sonnax part numbers to see more information.
Critical Wear Areas & Vacuum Test Locations Note: OE valves
are shown in rest position and should be tested in rest position
unless otherwise indicated. Test locations are pointed to with an
arrow. Springs are not shown for visual clarity. Low vacuum reading
indicates wear.
20
25
15
0
10
5
30VACUUMTEST
20
25
15
0
10
5
30VACUUMTEST
Boost Valve AssemblyPoor line riseSlipping upshiftsBurnt
bands/clutches
Converter Feed Limit ValveFront lube failureOverheat and/or
delayed engagementIncreased stall RPM
Replace with Sonnax Part No.56947J-61K
Pressure regulator ValveDelayed engagementSoft
shiftsInsufficient line riseErratic buzzHigh/uncontrollable line
pressure in reverse
Install Sonnax Part No.56947J-09K
reverse Engagement ValveSlipping/no/delayed reverseBurned direct
clutch
Replace with Sonnax Part No.56947J-29K
reverse Modulator ValveDelayed reverse engagementLoss of 4th or
5thBurned direct clutch
Replace with Sonnax Part No.56947J-23K
Intermediate Servo release ValveBurned intermediate band
VFS2 Modulator Control ValveLow line pressureSlipping
upshiftsBurned overdrive bandBurned coast clutch
Replace with Sonnax Part No.56947J-19K
Coast Clutch Control Valve Burned coast clutch
Converter Clutch Back Pressure Valve Excessive TCC slipConverter
codesBurned converter lining
TCC Control ValveExcess TCC slipTCC lining coming offOverheated
converters
Restricted cooler flowCode 741
Replace with Sonnax Part No.56947J-05K
TCC Modulator Sleeve & Plunger AssemblyHigh TCC slip RPM at
increasing loadSlip codesElevated fluid temperature
Replace with Sonnax Part No.56947J-01K OE Ratio56947J-03K
Increased Ratio
TCC Modulator ValveCodes 741 or 1783Transmission overheatHigh
line pressure
Replace with Sonnax Part No.56947J-15K
overdrive Servo Control ValveBurned overdrive band
Intermediate Servo Select Valve Burned intermediate bandBurned
direct clutch
Forward Engagement ValveSlipping/no/delayed forwardBurned
forward clutch
Replace with Sonnax Part No.56947J-26K
VFS1 PortLow line pressureSlipping shiftsNOTE: Check for wear on
end plugs.
Solenoid Feed Limit ValveGear ratio codes 731 to 741No TCC
applyFlooded solenoids
Replace with Sonnax Part No.56947J-61K
VFS1 Modulator Control ValveLow line pressureSlipping
upshiftsBurned intermediate and/or low/reverse band
Replace with Sonnax Part No.56947J-19K
Test these together.
Plug casting valley with foam, putty or appropriately sized
O-ring coated in assembly lube to isolate circuits.
reverse Servo Control ValveNo/delayed reverseBurned low/reverse
band
direct Clutch Control ValveDelayed reverse engagementLoss of 4th
or 5thBurned direct clutch
2013 Sonnax Industries, Inc. 5R55W-S_VacTestLocations
02-28-13
800-843-2600 802-463-9722 F: 802-463-4059 www.sonnax.com Page
2
Ford 5r55W/STIME TESTED INDUSTRY TRUSTED
oE Exploded View
116
115
114
113
112
111
110
109
101
102103
104
105
106
107
108
Lower Valve Body descriptions
I.D. No. Description
101TCC Control Valve (inboard)Fluid Cooler Bypass & Thermo
Valve (outboard)
102
Converter Clutch Back Pressure Valve (inboard)Coast Clutch
Control Valve (outboard)
103 VFS2 Modulator Control Valve
104 Intermediate Servo Release Valve
105 Direct Clutch Control Valve
106 Reverse Modulator Valve
107 Reverse Engagement Valve
108 VFS1 Modulator Control Valve
109Main Regulator Valve (inboard)Boost Valve & Sleeve
(outboard)
110
Solenoid Feed Limit Valve (inboard)Coverter Feed Limit Valve
(outboard)
111 Manual Valve
112 Rear Servo Control Valve
113 Intermediate Servo Select Valve
114Forward Engagement Control Valve
115 Overdrive Servo Control Valve
116TCC Modulator Valve (inboard)TCC Plunger Valve & Sleeve
(outboard)
