Citation V6-173 2.8L VIN Z 2-bbl HP (1983)
Case: All Technical Service Bulletins
A/T - Oil Pan and Valve Body Cover Leaks
Number:
84-8
Section:
7A (VIIc)
Date:
Oct., 1983
Subject:
TRANSAXLE OIL PAN AND VALVE BODY COVER LEAKS
Model and Year:THM 125/125C
FIGURE 1 - TRANSAXLE OIL PAN
TO:
ALL CHEVROLET DEALERS
Beginning in September, 1983, the THM 125/125C transaxle went into production using a new oil pan and valve body cover. This new
oil pan (P/N 8643574) and valve body cover (P/N 8643575) are thicker and have a raised, continuous rib on the flange (see Figure 1).
FIGURE 2
The new oil pan requires a new gasket (P/N 8643572). The new valve body cover also requires a new gasket (P/N 8631340). New hex head bolts with
conical washers (P/N 8643879) are to be used with both the oil pan and valve body cover (see Figure 2).
SERVICE INFORMATION
1.
If a leak occurs, refer to your service manual for diagnostic and disassembly/reassembly procedures.
2.
When servicing any THM 125/125C transaxle for a leak in the oil pan or valve body cover area, visually inspect the oil pan and valve body cover
bolts to determine if the new parts have been installed (refer to Figure 2).
3.
If the transaxle was built prior to September, 1983 order service package 8653942 to correct a leak in the oil pan area, or service package 8653943
to correct a leak in the valve body cover area. These packages contain:
SERVICE PACKAGE 8653942
SERVICE PACKAGE 8653943
Qty.
Description
P/N
Qty.
Description
P/N
1
Pan, Transaxle Oil
8643574
1
Cover, Valve Body
8643575
1
Gasket, Transaxle oil
1
Gasket, Valve Body
Pan
8643572
Cover
86631340
16
Assembly, Hex Head
1
Assembly, Hex Head