Bonneville V6-3800 3.8L Supercharged (1992)
Channel Plate: All Technical Service Bulletins
Transaxle - Bearing Whine Audible in 1st, 2nd, 3rd Gear
Bulletin Number: 93-7-25
Reference Number: 377130
Publish Date: 8/93
Subject:
TRANSAXLE BEARING WHINE AUDIBLE
Models Affected:
IN 1ST, 2ND, AND 3RD GEAR (REPLACE BEARING ASSEMBLY)
1991-93 6000, BONNEVILLE, GRAND PRIX AND TRANS SPORT MODELS
TRANSAXLE APPLICATIONS:
HYDRA-MATIC 4T60 (RP0 ME9)
HYDRA-MATIC 4T60-E (RP0 M13)
TRANSAXLE MODELS:
ALL
CONDITION:
Some vehicles equipped with a HYDRA-MATIC 4T60 (RPO ME9) or 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 "driver's" side of the vehicle while in
2nd gear during a light throttle acceleration.
IMPORTANT:
This bearing whine cannot be heard in "Park" or "Neutral."
CAUSE: (Figure 1)
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:
