Some 1983 and 1984 THM 200-4R OZ model transmissions may have a worn or cracked thrust washer (rear carrier to low race).
Starting with julian date (314) on 200-R4 OZ model transmissions a new thrust bearing assembly and rear reaction carrier assembly went into production.
When servicing any 1983 or 1984 THM 200-4R OZ model transmission for a worn or cracked thrust washer, order service package 8639909.
Service Package 8639909 contains:
1 Carrier Assembly - Rear Complete 1 Bearing Assembly Thrust 1 Instruction Sheet
The new thrust bearing assembly cannot be used with the past rear carrier assembly.
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.