A/T Oil Pan and Valve Body Cover - Leaks
Number 83-I-149A Section 7 Date 12/83Subject: TRANSAXLE OIL PAN AND VALVE BODY COVER LEAKS - THM 125/125C TRANSAXLE
Please discard previous bulletin 83-I-149, Section 7 due to incorrect part numbers..
Figure 1:
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 (part number 8643574) and valve body cover (part number 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 (part number 8643572). The new valve body cover also requires a new gasket (part number 8631340). New hex head bolts with conical washers (part number 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.
Figure 2:
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:
8653942 8653943
PART PART
QTY. DESCRIPTION NUMBER QTY. DESCRIPTION NUMBER
1 Pan, Transaxle Oil 8643574 1 Cover, Valve Body 8643575
1 Gasket, Transaxle 8643572 1 Gasket, Valve Body 8631340
Oil Pan Cover
16 Assembly, Hex Head 8643693 11 Assembly, Hex Head 8643693
Screw & Conical Washer Screw & Conical Washer
1 Instruction Sheet 1 Instruction Sheet
4. If the transaxle was built after September, 1983, the gasket, bolts, oil pan and/or valve body cover can be ordered separately.
5.. Do not use RTV with the new transaxle oil pan or valve body cover. Oil leaks may result.
6. When assembling the oil pan or valve body cover, follow procedures outlined in your Service Manual. Do not use impact tool, or overtorque attaching bolts. Overtorquing may result in split or cracked gaskets. Bolts should be torqued to 8-14 N-m (6-10 ft.lbs.).