DIFFER. GEAR WEAR OR DIRECT CLUTCH DRUM BUSHING WEAR

Model and Year: 1985-87 SPRINT WITH AUTOMATIC TRANSMISSION

This bulletin is being revised to add additional information under the differential side and pinion gears worn heading. All copies of 87-276-7A dated FEB., 1988 should be discarded.

Some Sprint vehicles may experience improper operation of the automatic transmission due to wear of the differential side and pinion gears and/or wear of the direct clutch drum bushing.

Corrective action was incorporated in vehicles built after the following serial numbers (last 8 VIN characters):

For differential side and pinion gear wear.

HK740463 (2 Door) HK740416 (4 Door)

For direct clutch drum bushing wear.

HK746352 (2 Door) HK746297 (4 Door)

Vehicles exhibiting these conditions built before the above serial numbers, should be repaired using the following parts which can be obtained from GMSPO.

DIFFERENTIAL SIDE AND PINION GEARS WORN

Replace worn/damaged parts as required, using new transmission case assembly, P/N 96057455 following shop manual procedures.

DIRECT CLUTCH DRUM BUSHING AND ASSOCIATED PARTS WORN/DAMAGED

Three different sets of replacement parts are available from GMSPO and the appropriate set should be ordered according to the extent of repair/replacement required. The sets and contents are described as follows:

Pump Set, Oil P/N 96057153

includes: Oil Pump 96057143 Ring, Oil Pump Cover Seal 96057149 Drum, Direct Clutch 96057146 Seat, Return Spring 96057147 Ring, Clutch Plate Snap 96057148 Washer, Direct Clutch 96057150 Washer, Direct Clutch 96057151

Cover Set, Oil P/N 96057154 Pump

includes: Cover, Oil Pump 96057144 Ring, Oil Pump Cover Seal 96057149 Drum, Direct Clutch 96057146 Seat, Return Spring 96057147 Ring, Clutch Plate Snap 96057148 Washer, Direct Clutch 96057150 Washer, Direct Clutch 96057151

Cover Set, Direct P/N 96057155 Multi Disc

includes: Cover, Oil Pump 96057144 Ring, Oil Pump Cover Seal 96057149 Clutch, Direct Multi-Disc 96057145 Washer, Direct Clutch 96057150 Washer, Direct Clutch 96057151

Follow shop manual procedures when installing any of the above sets of parts.

Labor Operation Number: K7620

Labor Time: 4.6 Hours

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.