Some 1985 and 1986 'J' cars with THM 125C automatic transaxles (MD9) may exhibit a noise generated by an interference condition between the plastic converter cover and the flexplate.
Vehicles exhibiting this condition may be repaired by trimming the converter cover in the area of the interference as shown in the illustration.
Use applicable Labour Time and Operation Number add 0.1 hours for trimming cover.
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.