This bulletin supercedes Bulletin 92-T-30, which should be discarded.
The 2nd driven gear bearing assembly (P/N 21001502) has been eliminated due to a design change. Vehicles built with an MP6 or MP7 automatic transaxle after, and including VIN NZ174649 do not have a 2nd driven gear bearing assembly between the 2nd driven gear and the 2nd driven gear race. Also, the inner diameter of the 2nd driven gear has been reduced for a direct gear to race fit.
Only the 2nd driven gear with a reduced inner diameter will be available for service. If the 2nd driven gear is replaced on a vehicle built before, and including VIN NZ174648, remove and discard the 2nd driven gear bearing assembly.
PARTS REQUIREMENTS: 21002606 2nd Driven Gear (New Design) - Perf (MP7) 21002605 2nd Driven Gear (New Design) - Base (MP6)
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.