A/T - 46RE Shift Quality/Durability Improvement: Overview

NUMBER: 21-20-99

GROUP: Transmission

EFFECTIVE DATE: Nov. 29, 1999

SUBJECT:
46RE Transmission Shift Quality Improvement for a Drive - Rev - Drive Shift Maneuver

OVERVIEW:
This bulletin involves selectively erasing and reprogramming the JTEC Powertrain Control Module (PCM) with new software (calibration change OOCal13 and O0Cal13A).

MODELS:
2000 (AB) Ram Van
2000 (AN) Dakota
2000 (BR/BE) Ram Truck
2000 (DN) Durango

NOTE:
THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 46RE AUTOMATIC TRANSMISSION BUILT BEFORE NOVEMBER 12, 1999 (MDH 1112XX).

SYMPTOM/CONDITION:
A change has been made to the PCM software to improve the durability of the transmission internal friction components when certain Drive-Reverse-Drive shift maneuvers are attempted. This type of shift maneuver is often associated with, but not limited to, snow plowing activities.

The new PCM software improves upon the current engine torque management when the above shift maneuvers are attempted.

DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III) with the appropriate Diagnostic Procedures Manual, verify all engine/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. If no DTC's are present, and the above symptoms have been experienced, perform the Repair Procedure.

NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.

PARTS REQUIRED:

1 04669020 Label, Authorized Software Update
1 04275086 Label, Authorized Modification

EQUIPMENT REQUIRED:

1 CH6OOO Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7OOO/7001 J1962 Cable
1 MDS2

NOTE:
THE MDS2 AND DRB III ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III, THE SYSTEM MUST BE OPERATING AT CIS CD 2046 OR HIGHER.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 08-19-43-97 0.5 Hrs.

FAILURE CODE: FM - Flash Module