Axle - Noise/Whine Between 35 and 55 MPH

NO: 03-07-98

GROUP: Axle And Propshafts

DATE: Dec. 11, 1998

SUBJECT:
Axle Noise/Whine Between 35 And 55 MPH

MODELS:

1998 - 1999 (AB) Ram Van

NOTE:
THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 9-1/4 OR DANA 60 (248RBI) AXLE BUILT PRIOR TO OCT. 1, 1998 (MDH1001XX).

SYMPTOM/CONDITION:

Some vehicles may exhibit axle noise in the 35 to 55 mile per hour range.

DIAGNOSIS:

Drive the vehicle on a smooth road and listen for axle noise in the 35 to 55 mile per hour range. Note if the noise is heard during drive or coast. The 9-1/4 axle noise may be heard during coast conditions and the Dana 60 (248RBI) may be heard during drive conditions.
If noise is heard, perform the Repair Procedure.

PARTS REQUIRED:

AR 82300234 Sealant, Adhesive (Grey)
AR 05010320AA Lube, 75W90 Gear
AR(1) 52105679AB Shaft, Prop (9-1/4 Axle)
AR(1) 52105678AB Shaft, Prop (Dana 60/248 RBI)

REPAIR PROCEDURE:

This bulletin involves checking gearset backlash, gear pattern, and replacing the prop shaft with a new torsionally damped part.

1. Drain the axle lube and remove the axle cover. Following service manual procedures, check the gearset for backlash and gear pattern. If proper backlash and gear pattern is found, proceed with the remaining steps. If improper backlash or gear pattern is found, make adjustments following standard procedures.

2. Following service manual procedures, remove the prop shaft.

3. Install p/n 52105679AB (9-1/4) or 52105678AB (Dana 60/248RBI) into the vehicle.

4. Road test the vehicle to confirm that the noise is minimized or gone.

5. If the noise is still heard, further axle diagnosis and repair will be required.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 16-30-01-99 1.0 Hrs.

FAILURE CODE: P8 - New Part