WILL NOT SHIFT OUT OF FIRST GEAR DUE TO THIS DETENT HOLDER for Pontiac Fiero 1986

WILL NOT SHIFT OUT OF FIRST GEAR DUE TO THIN DETENT HOLDER

MODELS AFFECTED 1986-1/2 FIERO MODELS WITH 5 SPEED MANUAL --------------- TRANSMISSION (HM-282) AND 2.8L ENGINE

BULLETIN COVERS:

Some 1986-1/2 Fiero vehicles equipped with a HM-282 five-speed manual transaxle may have a condition of not being able to shift out of first gear. This is caused by a detent holder that allows the 1-2 shift rail interlock pin to partially come out of the detent holder bore, preventing shifting of the transaxle out of first gear.

To correct this condition, install a thicker detent holder to assure proper retention of the interlock pin.

DATE OF PRODUCTION CHANGE: (Figure 1) -------------------------- Beginning September 8, 1986, all HM-282 transaxles were assembled with the thicker detent holder, thereby eliminating the need for the addition of a spacer plate. Vehicle Identification Number (VIN) break- points are listed below:

Assembly Beginning Up To And Model Plant VIN Including VIN ----- -------- --------- ------------- 1986-1/2 Fiero Pontiac GP200031 GP283971

SERVICE ACTION: (Figure 2) --------------- IMPORTANT: When servicing a 1986 HM-282 built before September 8, 1986, make sure the detent block spacer plate (169 (A)) is reinstalled (if so equipped) during assembly. If there is not a spacer plate, measure the detent holder width. If it is 15mm (0.59 in.) or 16.5mm (0.65 in), replace it with a thicker detent holder, 18mm (0.71 in.) listed under Service Parts Information (Figure 3) .

SERVICE MANUAL REFERENCE:

Refer to the appropriate On-Vehicle Service Manual for removal and installation procedures not covered in this bulletin.

SERVICE NOTES:

Please record this information in your current service manual for past model service.

SERVICE PARTS INFORMATION:

Part Number Description ------ ----------- 08672917 Detent Holder Package - Holder, Detent 18mm (0.71 in.) Thick - Pin, Interlock (Ill. #196) - Pins, Interlock (Ill. #168)

14082039 Cover, Detent Holder

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.