Brakes - Improved Rear Drum

REFERENCE BRAKES
NUMBER 007
DATE 11-15-84
MODEL AL

Rear Brake Drum:

A new rear brake drum with improved vibration damping characteristics is utilized on the 1985 Tercel 4x4 as shown below:
PRODUCTION EFFECTIVE

From Frame Number Production Date

JT2AL3#W*E0150734 August 1984


PART NUMBER INFORMATION

Previous Part Number New Part Number Part Name

42431-16030 42431-16031 Drum, Brake

Note: The new part is interchangeable with the previous part.

This new rear brake drum may also be used to improve rear brake vibration conditions which might exist on 1983 and 1984 Tercel 4x4 models.

The following step by step procedure is intended to aid in the diagnosis of rear brake vibration on 4x4 Tercel models.
1) Determine that the brake vibration originates from the rear brake system. To accomplish this, slowly apply the hand brake at various pressures and vehicle speeds. Make certain that the hand brake release button is held in continuously while operating the hand brake lever. If the vibration is present when using the hand brake, replace both rear drums with new rear drums (P/N 42431-16031), and install new brake shoes (P/N 04495-16030).

NOTE: It is very important to properly torque the rear wheels with a torque wrench after installation of the new drums. Impact guns should not be used. (Wheel nut torque - 65-87 ft.lbs.)

Road test to confirm repair.

2) If brake vibration is still apparent, refer to the appropriate repair manual for further diagnostic procedures.