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TSB 08-09-93

Intermittent Speed Control Operation

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Date: Mar. 12, 1993

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 08-28-92 REV A WHICH SHOULD BE REMOVED FROM YOUR FILES.

Models: 1992 - 1993 (AD) Ram Pickup/Ram Cab Chassis

1992            (MJ) Comanche
1992-1993  (AA) Acclaim/Spirit/LeBaron Sedan
                    (AB) Ram Van/Wagon
                    (AC) Dynasty/New Yorker Salon
                    (AD) Ram Pickup/Ram Cab & Chassis/Ramcharger
                    (AG) Daytona
                    (AJ) LeBaron Coupe/LeBaron Convertible
                    (AN) Dakota/Dakota Sport/Dakota Cab & Chassis
                    (AP) Sundance/Shadow/Shadow Convertible
                    (AS) Caravan/Grand Caravan/Caravan C/V Voyager/Grand Voyager/Town & Country
                    (AY) Imperial/New Yorker Fifth Avenue
                    (XJ) Cherokee
1993            (LH) Concorde/Intrepid/Vision
                    (ZJ) Grand Cherokee/Grand Wagoneer

Symptom/Condition:

The following describes speed control system operation symptoms that could be caused by the speed control servo and/or the EATX II TCM (Transmission Control Module).

1. Some vehicles may experience intermittent speed control disengagement when traveling at highway speeds. This usually occurs after 20-30 minutes of speed control operation, when the servo is at higher temperatures.

2. Some 1993 vehicles equipped with a 41TE or 42LE four-speed automatic transaxle may experience an intermittent speed control dropout and recover or intermittent disengagement when driving at any speed, usually on level ground. This is not dependent on the length of driving time or operating temperature.

Parts Required:

1    AR Servo, Speed Control

AA, AC, AG, AJ, AP, AS, AY, LH                                                          5277659
(Except models with 2.2L DOHC 16-Valve or 3.5L 24-Valve MPI engines)

Models with 2.2L DOHC 16-Valve or 3.5L 24-Valve MPI engines           4324052

AB, AD, AN, MJ, XJ, ZJ                                                                         53009315

NOTE:    THE ABOVE PARTS APPLY TO VEHICLES WITH A SPEED CONTROL SERVO BUILD DATE PRIOR TO 3142. SEE ILLUSTRATION FOR LOCATION OF BUILD DATE CODE ON METAL SECTION OF SERVO.

Speed Control Servo Identification

AR EATX II TCM (Transmission Control Module)

1    Authorized Modification Label                                                                          4275086

Repair Procedure:

This repair procedure involves replacing the speed control servo and/or EATX II TCM (where applicable) with a revised part.

NOTE: ONLY SPEED CONTROL SERVO'S WITH BUILD DATES PRIOR TO 3142 ARE SUSPECT.

1. Remove the speed control servo as outlined in the appropriate service manual.

2. Install the new speed control servo as outlined in the appropriate service manual.

NOTE: THE FOLLOWING REPAIR APPLIES TO 1993 VEHICLES EQUIPPED WITH A 41TE OR 42LE FOUR SPEED AUTOMATIC TRANSAXLE AND EATX II TCM IDENTIFIED IN THE PARTS REQUIRED SECTION.

3. Connect the MDS or the Scan Tool (DRB II) to the blue CCD Bus connector. Select the Transmission system. Record the part number of the EATX II TCM. If the part number matches one of the old part numbers called out in the Parts Required section, proceed to the next step.

NOTE: IF THE VEHICLE IS ALREADY EQUIPPED WITH TCM P/N 4686176, OR 4605364 OR 4686174, NO FURTHER ACTION IS NECESSARY.

4. Remove the EATX II TCM as outlined in the appropriate service manual.

5. Install the new EATX II TCM as outlined in the appropriate service manual.

6. Perform the required Transaxle Quick Learn and Pinion Factor procedures in the appropriate service manual.

7. Type the required information on the Authorized Modification Label, as illustrated, and attach near the VECI.

Notes:

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Replace Speed Control Servo

Labor Operation No. 21-97-10-91 . . . . . . . . 0.6 Hrs.

AA, AC, AG, AJ, AP, AS, AY, LH            14-20-03-94 . . . . . . 0.5 Hrs.
AB                                                              14-20-03-94 . . . . . . 0.3 Hrs.
AD, AN                                                      14-20-03-94 . . . . . . 0.2 Hrs.
MJ, XJ, ZJ                                                  14-20-03-94 . . . . . . 0.5 Hrs.

Optional Equipment
Turbo                                                          14-20-03-60 . . . . . . 0.1 Hrs.

Replace EATX II Transmission Control Module (TCM)

AA, AC, AG, AJ,                                        08-19-05-98 . . . . . . 0.4 Hrs.
AP, AS, AY, LH

FAILURE CODE:   P8 - New Part