Issue Some 2004 - 2005 vehicles built prior to 09/23/2004 and equipped
with the 5R55S transmission, may exhibit a delayed or harsh reverse
engagement. This condition may be due to improper pressure control.
ACTION It may be necessary to replace the solenoid body assembly. Refer
to the following Service Procedure.
SERVICE PROCEDURE
Note installing transmission additive will prevent the symptom on
solenoids that do not yet exhibit the condition but will not resolve the
condition if it already exists. Note contamination is not the cause of
the condition addressed by this tsb. It is not necessary to flush the
transmission cooler/cooler lines or replace the fluid pan filter
(7a098). Also, do not reprogram the pcm, replace the main control
assembly (7a100) or install an inline service filter (7b155). Note
during solenoid body replacement the vehicle’s battery must be
disconnected to properly clear the pressure adaptive tables. Lincoln ls
and thunderbird only
1. Lower the transmission cross member and transmission to gain access
to the pressure control solenoid-C (PCC) port. DO NOT disconnect the
drive shaft. 2. Install pressure gauge per Step 2 of “DIAGNOSTICS”,
below. 3. Reinstall cross member and snug the fasteners for diagnostic
purposes only. 4. Proceed with the “DIAGNOSTICS” section of this TSB.
5. After the TSB repair is completed, torque the cross member
fasteners to 41 lb-ft (55 N•m). DIAGNOSTICS – ALL VEHICLES 1. Remove
pressure tap plug at PCC port (Figure 1). 2. Install a pressure gauge
into the PCC port, using a 1″ long nipple and a 90 degree fitting
(Figure 2). Figure 2 – Article 05-21-8 3. Warm transmission to above
150° F (66° C).
Connect either WDS or NGS+ to verify that the Transmission Fluid
Temperature (TFT) is above 150° F (66° C). 4. Place vehicle in park,
engine off and check the gauge zero. This will be your gauge-starting
zero for the procedure in the next steps. Note and record gauge zero.
CAUTION IN ORDER TO OBTAIN CORRECT TEST RESULTS THE TRANSMISSION FLUID
TEMPERATURE MUST BE ABOVE 150° F (66° C) 5. Start engine and let idle.
Check the PCC pressure. PCC pressure should increase to between 0-15
psi. a. If the PCC pressure is 0-15 psi while at idle in park, enter
Output State Control with either NGS+ or WDS. b. For NGS select
Vehicle/Engine Selection; then select Diagnostic Data Link; select
Module (PCM or TCM); then select Active Commands; select Output State
Control; select Trans-Bench Mode. c. For WDS select Tool Box; then
select Datalogger, select Transmission; choose PCC# and push the tick
mark; scale PCC pressure to 150 psi max; once rescaled hit the # sign
then the button under the # sign and then the + sign to command
pressures up and – to command pressures down.
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