A/T - 3-2 Coastdown Clunk During Deceleration

Number 83-I-164 Section 7 Date 11/83
Subject: 3-2 COASTDOWN CLUNK 1983 THM 125-C TRANSMISSIONS
Some 1983 THM 125-C transmissions may exhibit a 3-2 coastdown clunk condition that is most noticeable at approximately 18 miles per hour when decelerating. The clunk may feel like a bump or harsh downshift. This 3-2 coastdown clunk condition may be caused by a broken intermediate servo cushion spring.

Beginning August 16, 1983, a new intermediate servo cushion spring (part number 8652057) went into production for the following THM 125-C transmission models:

BF CK PG EF EM HD
BL CT P3 ET EP HS
CE CC OP EK EQ
CL CD EB EL EJ

The past spring was blue in color, while the new spring is violet.

When servicing any THM 125-C transmission models listed above for a 3-2 coastdown clunk condition, follow the service procedure given below:

1. Refer to your service manual for disassembly and reassembly procedures.

2. Remove the intermediate servo cushion spring and visually inspect it for cracks, breaks, or damage.

3. If the intermediate servo cushion spring is cracked, broken, or damaged, replace it with part number 8652057.