A/T - Bearing Noise in Park or Neutral

Number 83-T-28 Section 7 Date 05/83

Subject: BEARING NOISE IN PARK OR NEUTRAL - 1982 AND 1983 THM 125C TRANSMISSION




Some 1982 and 1983 THM 125C transmissions may experience a noise condition, best described as a high pitch whine.

This noise condition, if only noticeable in Park and Neutral, and not in Drive or Reverse (while stopped with brake applied), could be caused from one or more of the following bearings..

1. Drive Sprocket Roller Cage Bearing
2. Driven Sprocket Roller Cage Bearing
3. Driven Sprocket Thrust Bearing

When servicing any 1982 or 1983 THM 125C transmission for this bearing noise, first inspect the drive and driven sprocket roller cage bearings and driven sprocket thrust bearing for wear or damage. If wear or damage is visible on any of the above bearings, replace them with service parts listed below.

1. Drive Sprocket Roller Cage Bearing - 8631186
2. Driven Sprocket Roller Cage Bearing - 8631190
3. Drive Sprocket Thrust Bearing - 9436851

Refer to your Service Manual for removal and installation procedures of the drive and driven sprocket support cage bearings.