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Models: 1996 - 1999 (BR/BE) Ram Truck
1996 - 1999 (AB) Ram Van
1996 - 1999 (AN) Dakota
1996 - 1999 (BR/BE) Ram Truck
1998 - 1999 (DN) Durango
1996 - 1999 (TJ) Wrangler
1996 - 1999 (XJ) Cherokee
1996 - 1998 (ZJ) Grand Cherokee
1999 (WJ) Grand Cherokee
NOTE: THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A RE OR RH AUTOMATIC TRANSMISSION.
This bulletin involves replacing the transmission regulator valve.
Some vehicles may exhibit an intermittent noise from the transmission when reverse gear is selected. This noise has been described as a "buzz", whining", or "moaning" like noise. The noise is most noticeable when transmission fluid temperature is below 38° C. (100° F.). The condition is caused by a resonance of the transmission regulator valve system. Other items may cause regulator valve resonance, including air ingestion into the valve body or out of specification parts. These two items may be the result a possible cracked pump housing, a torn pump gasket, an under filled transmission, a restricted fluid filter or cooler flow, or an out of specification valve and/or valve body. You should remember these additional items / components when you perform your diagnosis.
Vehicles built prior to August 1, 1995 may experience this condition if either a transmission valve body or an entire automatic transmission was replaced with components manufactured after August 1, 1995.
Using the Diagnostic Scan Tool (DRB III) with the appropriate Diagnostics Procedure Manual, verify all engine and transmission systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin.
For 1996 and 1997 model year product, review Technical Service Bulletin 21-11-97 Rev A to determine if it applies to this vehicle before attempting to complete the analysis or repairs described in this bulletin.
In most instances, the sump temperature of vehicles exhibiting transmission regulator valve resonance in reverse has been less than 38° C. (100° F). If possible, allow the suspect vehicle to remain parked in a cool place overnight. Then perform the following steps:
1 04130169 Valve,
Steel Transmission Regulator
1 02464324 Gasket, Transmission Pan
AR 05010124AA Fluid, ATF Plus 3, Type 7176E
1 C-3763 Gauge Tool, Throttle Pressure Adjustment
POLICY. Reimbursable within the provisions of the warranty.
Labor Operation No: 21-95-01-90 ................................................................ 1.2 Hrs.
FAILURE CODE: P8 - New Part
Thanks to Bob Bergevin for supplying this TSB information
This page was edited on: May 3, 2004