Transmission Oil Pan - Revised Gasket and Bolts
Model Year 1983Bulletin No. 83-199
File in Group 70
Number 37
Date Oct. '83
SUBJECT: NEW TRANSMISSION OIL PAN, GASKET AND BOLTS
MODELS AFFECTED: ALL THM 325-4L
FIGURE 1 - NEW FLANGE:
The THM 325-4L transmission oil pan has been changed to improve the seal between the oil pan and transmission case. The new transmission oil pan (Part No. 8635854) is thicker and has a continuous rib on the flange. (See Figure 1)
FIGURE 2 - HEX HEAD SCREW AND CONICAL WASHER ASSEMBLY:
The new transmission oil pan requires a new thicker oil pan gasket (Part No. 8635884) and hex screw and conical washer assembly, (Part No. 8643693). (See Figure 2.)
Service Information
1. If a leak occurs refer to your service manual for diagnostic and disassembly/assembly procedures.
2. If the oil leak is in the transmission oil pan area visually inspect the oil pan and bolts to determine if the new design parts have been used.
If the unit is of the old design, you may need to order service parts listed below:
1 - Pan, Transmission Oil 8635854
1 - Gasket, Transmission Oil Pan 8635884
15 - Assembly, Hex Head Screw and 8643693
Conical Washer (Bolts)
If new design parts were used, you may only need the gasket and bolts or the gasket alone.
3. Do not use R.T.V. with the new transmission oil pan.
4. When assembling the oil pan follow your service manual procedures and take particular care not to over-torque the bolts. Over-torquing may result in split or cracked gaskets. Bolts should be torqued to 11 N-m (8 ft.lbs.).
5. Service Package No. 8635959 incorporating the parts listed above will be available approximately November 1, 1983.