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TSB 09-11-89

Knocking Noise at Rear of Engine - Cracked Torque Converter Drive Plate

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Date: July 3, 1989

Models: 1989 AD Ram Pickup Equipped With Cummins Diesel and Automatic Transmission

Symptom/Condition:

Some 1989 Dodge pickups equipped with the Cummins diesel engine and automatic transmission built before MDH 02-08-89 may exhibit a knocking or grinding noise at the rear of the engine. In some extreme cases, the noise may be accompanied with a no drive condition. This condition is the result of cracking of the drive plate in the area of crankshaft flange.

Diagnosis:

Start engine. Using a stethoscope, pinpoint noise location by listening at the rear of the engine and torque converter housing. If the noise is located in the torque converter housing area, perform the following repair procedure.

Parts Required:

1    Torque Converter Drive Plate PN   04429607
1   Crankshaft Bolt Backing Plate PN   04429753
1   Torque Converter                   PN   53008136

Repair Procedure: 

.This procedure involves the removal of the transmission and replacement of the torque converter drive plate.

1. Remove the transmission and torque converter per the procedure outlined on page 21-75 in the 1989 Rear- Wheel-Drive Truck Service Manual, Publication No. 81- 370-9008.

2. Remove the torque converter drive plate.

3. Install the new drive plate, PN 04429607, and backing plate, PN 04429753.

4. Using a star pattern torque sequence, Figure 1, tighten the drive plate to crankshaft bolts to 101 ft. lbs. (137 N-m) torque.

5. Remove the torque converter from the transmission.

6. Install the new torque converter, PN 53008136.

NOTE: USE CARE WHEN INSTALLING THE TORQUE CONVERTER TO PREVENT DAMAGING THE TRANSMISSION PUMP SEAL.

7. Install the transmission.

8. Start engine, adjust transmission fluid level as required.

9. Allow the engine to reach normal operating temperatures. Adjust the transmission throttle cable as outlined on page 21-4 in the 1989 Diesel Supplement Manual, Publication No. 81-370-9008A.

Notes: 

Policy:    Reimbursable within the provisions of the warranty.

Time Allowance:
Labor Operation No. 21-33-20-90 AD . . . . . . . . . .  2.6 Hrs.
                                                       AW . . . . . . . . . . 4.7 Hrs.

Failure Code:    11 - Broken or Cracked