M/T - Fluid Leak From the Level Indicator Assembly Bore
Bulletin Number: 88-7-4Reference Number: 877204R
Publish Date: 10/87
Subject: FLUID LEAK FROM THE FLUID LEVEL INDICATOR ASSEMBLY BORE
Models 1988 6000, SUNBIRD, GRAND AM, AND FIERO
Affected MODELS EQUIPPED WITH HM-282 MANUAL
TRANSAXLE (RPO MGI AND MG2) 1988 DAS, 8ZP, 8ZR, 8ZN, ZZJ AND 8ZL
Figure 1 - HM-282 Transaxle Identification Information RPO MG1/MG2:
BULLETIN COVERS: (Figure 1)
Some early 1988 6000, Sunbird, Grand Am, and Fiero models equipped with an HM-282 manual transaxle (RPO MG1 and MG2) may experience a fluid leak from the indicator bore..
DATE OF PRODUCTION CHANGE:
An updated design fluid level indicator assembly is estimated to be used in production November, 1987.
Figure 2 - Fluid Level Indicator Assembly And Bore:
SERVICE ACTION: (Figure 2)
If this condition is encountered, try to pull out the indicator (with the cam-lock on). If the indicator pulls out install the updated design fluid level indicator assembly (estimated availability for service December, 1987). The updated design has four grooves in the plug to help "grab" on the bore. The new indicator will also have an expanded "OK" fluid level section that is crosshatched.
If the updated design indicator is not available then the fluid level indicator bore will have to be "roughed" up so the plug of the old design will "grab" on the bore. To service, perform the following procedure.
1. Release the cam-lock then remove fluid level indicator assembly.
2. Wipe indicator bore with Synchromesh Transmission Fluid (STF).
3. Put a new battery terminal brush (15 mm (5/8 in.) minimum diameter) into the bore and rotate at least eight complete turns.
NOTICE: Use a NEW battery terminal brush -- a used brush can leave corrosion and other foreign material inside the transaxle.
4. Remove battery terminal brush and clean bore with a clean cloth.
5. Install fluid level indicator assembly.
6. Check for proper fit by trying to pull out the indicator with the indicator cam-lock on.
- If the indicator can be pulled out, repeat the above procedure.
SERVICE PARTS INFORMATION:
Fluid Level Indicator Assembly (new design) GM P/N 22540197
Synchromesh Transmission Fluid (STF) GM P/N 12345349
SERVICE NOTES:
The MG282 is now referred to as the HM-282.