Custom Cruiser RWD V8-350 5.7L (1992)
Clutch: All Technical Service Bulletins
A/T - Click or Whine Noise in 3RD, 4TH Gear
NUMBER: 93-T-70
CORP.REF.NO: 277121R
DATE: June 1993
SECTION: 7A, 4L60 4L60E
SUBJECT:
CLICK/WHINE IN THIRD/FOURTH GEAR
- INSTALL NEW LOW AND REVERSE CLUTCH FIBER
MODEL/YEARS:
1991-92 CUSTOM CRUISER AND 1991-93 BRAVADA
This bulletin cancels and supersedes Dealer Technical Bulletin 92-T-82 which should be discarded.
CONDITION:
Some 1991-93 vehicles with HYDRA-MATIC 4L60 or 4L60-E transmissions built before November 19, 1992 (Julian Date 324) may exhibit a clicking
or whining noise in third and fourth gear. A customer may also describe it as a ticking or rattle noise.
CAUSE:
The clicking noise is caused by transmission fluid passing over the friction plates of the low and reverse clutch. The fluid causes them to vibrate when
the low and reverse clutch is not applied (third and fourth gear).
CORRECTION:
Install five new fiber plates in the low and reverse clutch. The new plates have a nongroove configuration.
Note:
All HYDRA-MATIC 4L60 and 4L60-E transmissions built on or after November 19, 1992 (Julian Date 324) have been assembled with the new low and
reverse clutch fiber plates.
PARTS INFORMATION:
Parts are expected to be available on 6/07/93.
