Fleetwood Brougham V8-350 5.7L (1991)
Clutch: All Technical Service Bulletins
A/T - No Reverse/Delayed Reverse
Bulletin No.
T-92-89
File in Group
7
Number
239
Corp. Ref. No.
277111R
Date
April, 1992
SUBJECT:
NO REVERSE/DELAYED REVERSE COLD (INSTALL LONG LIPPED REVERSE INPUT CLUTCH PISTON OUTER SEAL)
MODELS AFFECTED:
1989-1991 BROUGHAMS WITH HYDRA-MATIC 4L60 (700-R4) TRANSMISSION (VIN CODE "7" OR "E")
Some 1989-1991 Hydra-Matic 4L60 (THM 700-R4) transmissions may exhibit a "no reverse" or "delayed reverse" condition when outside temperatures
are below O~ F (-18~ C).
A transmission is considered to have a delayed reverse condition if it takes longer than three seconds for the transmission to engage when shifted into the
reverse range.
If a transmission has a "no reverse" or "delayed reverse" condition, inspect the reverse input clutch piston outer seal. Determine if the seal is a "short lip"
or "long lip" design by comparing it to Figure 1. If it is a short lip design, replace it with a long lip seal contained in the service packages listed.
The long lipped seals are available in several service packages:
Parts are currently available from GMSPO.
If the reverse input clutch piston outer seal is a long lip design or the newly installed long lip seal doesn't alleviate the delayed reverse condition, the
reverse input clutch housing should be replaced (P/N 8663068).
Refer to the Hydra-Matic 4L60 Automatic Transmission Unit Repair Section of the appropriate Service Information Manual for instructions on installing
the reverse input clutch seals and housing.
