WHINE NOISE IN PARK OR NEUTRAL-UPDATE

This bulletin provides additional information to the original issue of Serviceman Bulletin 83-73. Changes to the original bulletin are shaded for reference; discard Serviceman Bulletin 83-73.

1982 and 1983 Cimarrons equipped with THM 125C transaxles which may experience a noise condition that can be described as a high pitched whine. This noise condition, if only noticeable in park and neutral, and not in Drive or Reverse (while stopped and the brakes applied) could be caused by one or more of the following parts (refer to Figure 1):

Item Number Description Part Number

108 Drive Sprocket Roller Cage Bearing 8631186 601 Driven Sprocket Roller Cage Bearing 8631190 121 Driven Sprocket Thrust Bearing 9436851 122 Driven Sprocket 8631217

When servicing any 1982 or 1983 THM 125-C for this noise condition, carefully inspect these four parts for wear, damage or a rough or worn bearing surface area. Replace any suspect parts with service part(s) listed above.

Refer to the Service Information Manual for removal and installation procedures of the drive and driven sprocket support cage bearings as well as the driven sprocket and its thrust bearing.

For warranty purposes, use labor Operation Number T6077 at 4.5 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.