For 1990-2009 cars

# MANUAL TRANSMISSION REPAIR PROCEDURES

TRANSMISSION APPLICATIONS: SUBJECT: ------------------------- ------- HM-282 MANUAL TRANSAXLE TRANSMISSION REPAIR PROCEDURES (RPO MG1 AND MG2) HM-290 MANUAL TRANSMISSION (RPO MCO AND MG5)

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ------------------- -------------------- ALL MODELS HM-282: Some 1986 1/2 P MODEL , some 1987 A, J, N AND P MODELS, some 1988 A, J, L, N, P AND W MODELS, HM-290: SOME 1988 C AND K TRUCKS

#### BULLETIN COVERS:

Field Service of the 1986 1/2 through 1988 HM-282 manual transaxles and 1988 HM-290 manual transmissions. These transmissions are currently being repaired by installing new assemblies. Once all four items listed under Service Action have been completed, dealerships should repair these transmissions.

#### SERVICE ACTION:

1. Product Service Training:

HM-282 - Course Number 17702.08 (1 day class) HM-290 - Course Number 17703.16 (2 day class)

2. Essential Service Tools: * Selected dealers have been shipped all essential tools.

#### NOTICE: A small (toaster) oven is required to service both units but is not listed as an essential tool. The oven is used to heat certain parts to prevent damage to them during assembly. Dealerships should obtain an oven before servicing these units.

3. Service Parts:

The service parts are available through General Motors Service Parts Operations. Refer to the appropriate Parts Catalog.

4. Service Manuals:

Service procedures for the HM-282 and HM-290 can be found in the appropriate 1988 Service Manual.

* Dealerships not selected to service these transmissions should follow local Zone policy if a vehicle requiring transmission repair is encountered. This may involve forwarding the vehicle to a qualified dealer as a sublet repair.

All dealerships will be servicing these transmissions in the 1989 model year. The essential tools will be shipped to dealers who have not already received them on February 15, 1988. The training courses listed above will be available to these dealers in the spring.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.