Sierra 1500 2WD V8-5.3L Hybrid (2004)
Seals and Gaskets: Customer Interest
A/T - 4T80E, Slips in Gear/L/H Axle Seal Leaks
TECHNICAL
Bulletin No.: 08-07-30-009B
Date: May 01, 2008
Subject:
HYDRA-MATIC(R) Front Wheel Drive 4T80-E (MH1) Left Front Axle Seal Leak, Transmission Slips in Gear (Replace Third Clutch Housing with
Revised Service Part)
Models:
2001-2008 GM Passenger Cars
with HYDRA-MATIC(R) Front Wheel Drive 4T80-E Automatic Transmission (RPO - MH1)
Supercede:
This bulletin is being updated to revise the Warranty Information. Please discard Corporate Bulletin Number 08-07-30-009A (Section 07 -
Transmission/Transaxle).
Condition
Some customers may comment on a transmission oil leak and/or that the transmission slips in gear.
Cause
An oil leak may be caused by bushing wear in the third clutch housing, causing excessive fluid build-up at axe sea.
Correction
Important:
DO NOT replace the transmission for above concerns.
Replace the third clutch housing with service P/N 8682114, which has revised bushing material to extend life and reduce left front axle seal leaks. Refer
to Automatic/Transaxle - 4T80-E Transmission Off-Vehicle Repair Instructions for the replacement of the third clutch housing in SI.
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
