A/T - Gear Whine Noise Between 20 and 40 MPH
Group Ref.: 7 - TransmissionBulletin No.: 217106A
Date: June, 1994
SUBJECT:
TRANSAXLE GEAR WHINE NOISE BETWEEN 20 AND 40 MPH (INSTALL SRTA AND BRACKET KIT)
MODELS:
1991-1993 CADILLAC FLEETWOOD (FWD), SIXTY SPECIAL, ELDORADO AND SEVILLE
1991-1994 CADILLAC DEVILLE
TRANSAXLE APPLICATIONS:
HYDRA-MATIC 4T60-E (RPO M13)
THIS BULLETIN IS BEING REVISED TO ADD THE 1994 DEVILLE, INCLUDE ADDITIONAL REPAIR INFORMATION, AND ADD A STATEMENT CONCERNING TECHNICAL ASSISTANCE IN CANADA. PLEASE DISCARD BULLETIN 217106. (GROUP REFERENCE 7 - TRANSMISSION).
CONDITION:
Some owners may experience a final drive gear whine noise. The final drive noise may be detected during a light acceleration or closed throttle deceleration between 20 and 40 MPH.
CAUSE:
This condition may be due to a combination of the final drive gear tooth design and vehicle powertrain mounting.
CORRECTION: (Figure 1)
Drive the vehicle and confirm the following:
^ The noise is only present during a light acceleration or closed throttle deceleration between 20 and 40 MPH.
^ The noise is not present in PARK or NEUTRAL ranges.
^ The noise is present in 2nd, 3rd or 4th gear (does not go away in 3rd gear). If the noise does not conform to the above listed conditions, this bulletin does not apply. If all of the above noise conditions are met, determine the transaxle model using Figure 1 and follow the instructions for each model as follows:
1991 Fleetwood (FWD) and Sixty Special and some 1991-1993 De Ville:
Transaxle Models:
1AHW, 1AVW
2AVW, 2A5W
3AVW
A "quiet" Service Replacement Transaxle Assembly (SRTA) that is shipped with a modified engine to transaxle bracket is available to repair this condition on these models. Install the kit listed in "Parts Information". An instruction sheet is included with the kit.
Some 1991-1994 De Ville, 1992-1993 Fleetwood (FWD) and Sixty Special:
Transaxle Models:
1AHW, 1AZW
2ABW, 2AZW, 2A1W, 2A8W
3ABW, 3AZW
4ATW
These models have Traction Control (RPO NW9) or are limousine models with a 32 tooth reluctor ring on the Final Drive Carrier. Contact Cadillac Technical Assistance (1-800-CAD-STAR) for repair information on these models (in Canada, contact the Technical Assistance Centre).
1991-1993 Eldorado and Seville and 1992-1993 De Ville Touring Sedan:
Transaxle Models:
1AMW, 1AYW, 1A2W, 1A7W
2AMW, 2ANW, 2A2W, 2A3W
3AMW, 3ANW
The correction for this condition on these models has not yet been determined. Replacement with currently available parts is not recommended. Dealers are requested to defer repair attempts at this time.
PARTS INFORMATION:
1991 Fleetwood (FWD) and Sixty Special and some 1991-1993 De Ville:
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
1991 Fleetwood (FWD) and Sixty Special and some 1991-1993 De Ville: For vehicles repaired under warranty, use: (see illustration)