A/T - Transmission End Play
Number: 83-I-108
Section: VIIC
Date: August, 1983
Subject: TRANSMISSION END PLAY - SERVICE INFORMATION THM 700 - R4 (ALL)
TO: ALL CHEVROLET DEALERS
Some confusion exists on obtaining the correct transmission end play for THM 700-R4 transmissions. The following information will be helpful to technicians when checking or setting end play.
Service Information
1. Refer to the service manual for the correct procedure to check transmission end play.
FIGURE 1 - BEARING ASSEMBLY:
2. If end play is not within specification or cannot be brought within specification by changing the selective washer, the transmission probably is misassembled. See Figure 1.
FIGURE 1 - BEARING ASSEMBLY:
Figure 2 - Bearing Assemblies and Thrust Washers:
The most common type of misassembly, which affects end play, is either omitting or incorrectly installing bearing assemblies or thrust washers. If misassembly is suspected, first check for proper installation of the bearing assembly (615) and selective thrust washer (616) shown in Figure 1. Next check for proper installation of all other bearing assemblies and thrust washers as shown in Figure 2.
Figure 2 - Bearing Assemblies and Thrust Washers:
ILL.
NO. DESCRIPTION
601 WASHER, THRUST (PUMP TO DRUM)
608 SEALS, REVERSE INPUT CLUTCH -
INNER & OUTER
615 BEARING ASSEMBLY, STATOR SHAFT/
SELECTIVE WASHER
616 WASHER, THRUST (SELECTIVE)
622 SEAL, "O" RING INPUT TO FORWARD HSG.
624 SEAL, 3RD & 4TH CLUTCH-INNER & OUTER
629 SEAL, FORWARD CLUTCH-INNER & OUTER
631 SEAL, OVERRUN CLUTCH-INNER & OUTER
637 BEARING ASSEMBLY, INPUT SUN GEAR
660 WASHER, THRUST (INPUT CARRIER/RACE)
ILL.
No. DESCRIPTION
663 BEARING ASSEMBLY, THRUST (INPUT
CARRIER TO REACTION SHAFT)
669 WASHER, THRUST (REACTION SHAFT/SHELL)
674 WASHER, THRUST (RACE/REACTION SHELL)
683 BEARING ASSEMBLY, THRUST (REACTION
CARRIER SUPPORT)
692 BEARING, REACTION GEAR SUPPORT
TO CASE
696 SEAL, TRANSMISSION (LO & REVERSE
CLUTCH - OUTER, CENTER - INNER)
NOTICE:
Do not try to correct end play by grinding down the selective thrust washer, using two selective thrust washers, or omitting the selective thrust washer.
Figure 3 - Transmission Assembly:
3. When the transmission is properly assembled, there is normal clearance between the reverse input clutch housing and drum assembly (605), and the reaction sun shell (670). This normal clearance (1.121 mm to 3.744 mm) will not affect the transmission end play. This clearance can be observed through the case opening as shown in Figure 3. Do not try to shim this clearance out of the transmission.
4. End play outside of 0.13 to 0.92 mm (.005 - .036) will cause excessive wear to all bearing assemblies, thrust washers, and their mating parts.