A/T - 4th to 3rd Gear Coast Down Shift Point
NO: 21-08-98GROUP: Transmission
DATE: May 22, 1998
SUBJECT:
4 - 3 Coast Down
Shift Point
MODELS:
1998 (LH) Concorde/Intrepid
NOTE:
THIS INFORMATION APPLIES TO VEHICLES BUILT PRIOR TO FEB. 17, 1998 (MDH 0217XX) WITH A 42LE TRANSAXLE.
DISCUSSION:
With the beginning of the 1998 model year, the 4 - 3 coast down shift point was moved to a higher speed (30 mph). This higher coast down point allows the transaxle to achieve a lower gear quicker, thus improving overall performance. Although this change increases overall performance, some customers may notice engine braking on the coast down due to it occurring at a higher speed and RPM. For some customers, this new feel is objectionable.
NOTE:
THE FOLLOWING REPAIR WILL CHANGE THE 4 - 3 COAST DOWN SHIFT POINT TO 15-17 MPH AND CHANGE SOME LOW SPEED KICKDOWNS (15-30 MPH) THAT WERE PREVIOUSLY AVAILABLE.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Diagnostic Scan Tool (DRB III(R) with the appropriate Diagnostic Procedures Manual, verify all engine/transmission systems are functioning as designed. If no DTC's are present and the customer complains about the above condition, perform the Repair Procedure.
NOTE:
WHENEVER A TRANSMISSION CONTROL MODULE (TCM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.
EQUIPMENT/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III(R))
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000/7001 J1962 Cable
1 04669020 Label - Authorized Software Update
1 04275086 Label - Authorized Modification
NOTE:
THE MDS AND DRB III(R) ARE REQUIRED TO PERFORM PART OF THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1159 OR HIGHER MUST BE INSTALLED.
REPAIR PROCEDURE:
This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software (calibration changes).
1. Connect the MDS (Mopar Diagnostic System) and DRB III(R) (Scan Tool) to the vehicle and power them up.
2. Use the arrow keys arid select # 2 MDS DIAGNOSTICS on the DRB III(R) MAIN MENU Screen.
3. Use the arrow keys arid select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
4. Use the arrow keys arid select VEHICLE CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
5. Use the arrow keys and select PROGRAMMING OF ALL OTHER CONTROLLERS USING MDS & DRB III(R) on the MDS, then press NEXT MENU.
6. Follow the steps presented on the MDS and DRB III which will allow the DRB III(R) to obtain the current part number of the TCM.
7. The MDS will display the part number of the TCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.
If the TCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the TCM on the vehicle and compare it to the part number displayed. If the TCM has already been updated, then another condition exists that will require further diagnosis and repair.
8. The MDS and DRB III(R) will prompt for any operator action needed during the remainder of the programming process.
NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY LAW.
9. Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Figure 1). Attach the label to the TCM and cover the label with the clear plastic overlay.
10. Type the necessary information on the "Authorized Modification Label" p/n 04275086 and attach the label near the VECI Label (Figure 2).
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-50-95 0.5 Hrs.
FAILURE CODE: FM - Flash Module