Ninety-Eight V6-3800 3.8L Supercharged (1993)
Case: Customer Interest
A/T - Audible Bearing Whine
NUMBER: 93-T-82
CORP.REF.NO: 377130
DATE: August 1993
SECTION: 7A
SUBJECT:
TRANSAXLE BEARING WHINE AUDIBLE IN 1ST, 2ND, AND 3RD GEAR - REPLACE BEARING ASSEMBLY
MODEL/YEARS:
VEHICLES EQUIPPED WITH HYDRA-MATIC 4T60-E TRANSAXLES (RPO-M13)
CONDITION:
Some vehicles equipped with a HYDRA-MATIC 4T60-E (RPO M13) transaxle built on or before June 23, 1993 (Julian Date 174), may exhibit a
transaxle bearing whine that is audible in 1st, 2nd, and 3rd gear. The whine is most audible on the "drivers" side of the vehicle while in 2nd gear during a
light throttle acceleration.
Note:
This bearing whine cannot be heard in "Park" or "Neutral."
CAUSE: (See illustration)
The Bearing Assembly, 4th Channel Plate Hub/Channel Plate" (503/431) may have been improperly installed causing the needle bearings to leave
indentation marks on the bearing race.
CORRECTION:
Replace the "Bearing Assembly, 4th Channel Plate Hub/Channel Plate" (503/431) located on the "Channel Plate Assembly" (404/401).
PART INFORMATION:
P/N for the "Bearing Assembly, 4th Channel Plate Hub/Channel Plate" is the same for the 4T60 and 4T60-E transaxle. Parts are currently available from
GMSPO.
Part Number
Description
8656393
Bearing Assembly, 4th Channel
Plate Hub/Channel Plate
