Corsica L4-121 2.0L (1988)
Carrier Pinion Gears: Technical Service Bulletins
A/T - Updated Carrier Thrust Washers
Number:
88-156-7A
Section:
7A
Date:
MARCH, 1988
Subject:
NEW INPUT CARRIER THRUST WASHERS
Model and Year:
1988 CELEBRITY, CAVALIER, CORSICA, BERETTA WITH THM 125/125C TRANSAXLE
TO:
ALL CHEVROLET DEALERS
Input carriers with the new Nibron coated Pinion washers entered production in THM 125/125C transaxles starting with Julian Date 355 (December 21,
1987).
FIGURE 1 - INPUT CARRIER WITH BATWING AND ROUND WASHERS
The Pinion Washers (Round and Batwing, refer to Figure 1), cannot be serviced individually. When servicing a THM 125/125C transaxle and inspection
of the Input Carrier reveals any of the Input Carrier Pinion Washers are worn and/or missing, a new input carrier must be installed. This input carrier
with new Nibron coating may be used on all past models.
The Input Carrier Assembly should be inspected for:
Pinion Damage Pinion tilt
Pinion end play - use a feeler gage - end play range 0.24 - 0.69 mm (0.009" - 0.027").
If Pinion end play is not in this range a new input carrier should be installed.
When ordering a new Input Carrier Assembly use the following part number:
Part No.
Description
8631681
Input Carrier Assembly Complete
