Century V6-181 3.0L (1983)
Thrust Washer/Bearing: Technical Service Bulletins
A/T - New Thrust Bearing Assembly
Bulletin 84-7125-4
Date
April '84
Ref. No. 84-186-7125
SUBJECT:
THRUST BEARING ASSEMBLY, FINAL DRIVE SUN GEAR TO DIFFERENTIAL CARRIER INFORMATION
MODELS AFFECTED:
ALL 1980 THRU 1984 THM 125/125-C
Since October, 1983 a new larger thrust bearing assembly (final drive sun gear to differential carrier) went into production in the 1984 model THM
125/125C transmission, using the 2.84 ratio final drive and differential assembly.
FIGURE 1
FIGURE 2
The difference between the two thrust bearing assemblies is the outer diameter size. Also the carrier bearing surface is machined larger to accommodate
the larger outer diameter bearing. Thrust bearing 8646254 (figure 1) is larger than thrust bearing 8628962 (figure 2).
The two thrust bearing assemblies are not interchangeable and damage to the final drive could result if the bearings are mixed. To assure correct usage
refer to the following service procedure.
Service Procedure:
1.
After removing the thrust bearing assembly from the final drive differential carrier measure the outer diameter using a standard ruler as shown in
figures 1 & 2.
2.
If the outer diameter is 2-1/8" order service package 8646254. If the outer diameter is 2" order part 8628962.
NOTE:
The larger thrust bearing assembly part number 8646254, was previously used on only the 3.06 and 3.33 ratio final drive assemblies, but now
