Converter Clutch - Vehicle Shudder on Lock Up
NO: 18-09-97GROUP: Vehicle Performance
DATE: Feb. 28, 1997
SUBJECT:
Vehicle Shudder During Torque Convertor EMCC (Lock-up) Operation/Diagnostic Trouble Code 38
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-17-96 REV. B, DATED OCT. 4, 1996, WHICH SHOULD BE REMOVED FROM YOUR FILES AND MARKED IN THE 1996 TECHNICAL SERVICE BULLETIN BOOK (PUBLICATION NO. 81-699-97010). ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE LABOR OPERATION CHANGES.
MODELS:
1989 - 1995 (AA) Acclaim/Spirit/LeBaron Sedan
1989 - 1993 (AC) Dynasty/New Yorker/New Yorker Salon
1990 - 1993 (AG) Daytona
1990 - 1995 (AJ) LeBaron Coupe/LeBaron Convertible
1993 - 1994 (AP) Sundance/Shadow
1990 - 1991 (AQ) Chrysler TC
1989 - 1995 (AS) Caravan/Voyager/Town & Country
1990 - 1993 (AY) Imperial/New Yorker Fifth Avenue
1993 - 1995 (ES) Chrysler Voyager (European Market)
1995 - 1996 (FJ) Avenger/Sebring/Talon
1996 (GS) Chrysler Voyager (International Market)
1995 - 1996 (JA) Cirrus/Stratus
1996 (JX) Sebring Convertible
1993 - 1996 (LH) Concorde/Intrepid/LHS/New Yorker/Vision
1996 (NS) Town & Country/Caravan/Voyager
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 41TE OR 42LE AUTOMATIC TRANSMISSION.
SYMPTOM/CONDITION:
NOTE:
DIAGNOSTIC TROUBLE CODE (DTC) 38 (TORQUE CONVERTER CONTROL OUT OF RANGE) MUST BE PRESENT FOR THIS BULLETIN TO APPLY. IF DTC 38 IS NOT PRESENT AND THE VEHICLE IS A 1989-95 MODEL, REFER TO TECHNICAL SERVICE BULLETIN 18-24-95 DATED JUNE 24, 1995 AND PERFORM AS NECESSARY. IF DTC 38 IS NOT PRESENT AND THE VEHICLE IS A 1996 MODEL, REFER TO TECHNICAL SERVICE BULLETIN 21-05-96 DATED APR. 26, 1996 AND PERFORM AS NECESSARY.
Vehicle shudders during full lock-up Electronically Modulated Convertor Clutch (EMCC) operation and DTC 38 is present. Full lock-up EMCC is indicated by 3LU or 4LU on the DRB III RPM display screen.
DIAGNOSIS:
This shudder condition can be the result of leakage in the transmission front pump caused by a worn pump bushing. It is sometimes accompanied by pump whine.
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRB III) with the appropriate Diagnostic Procedure Manual, verify all engine/transmission systems are functioning as designed. If Diagnostic Trouble Codes are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. If DTC 38 is present, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
This bulletin involves replacing the transmission front pump assembly and the transmission torque converter with one that has bonded converter clutch friction material and verifying the Transmission Control Module (TCM) part number.
1. Following the procedures outlined in the appropriate Service Manual, replace the torque converter and the transmission front pump assembly with the parts identified in the Parts Required section of this bulletin.
2. Perform the transmission oil cooler and lines reverse flushing and flow check procedure as outlined in the appropriate Service Manual.
3. Verify the TCM is the appropriate part number listed:
4. For 1989 - 1995 vehicles that do not have the appropriate TCM part number listed above, perform REPAIR PROCEDURE NO. 1 of Technical Service Bulletin 18-24-95. For 1996 vehicles that do not have the appropriate TCM part number listed above, perform the Repair Procedure of Technical Service Bulletin 21-05-96.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No:
21-60-05-91 1989 - 1995 AA,AC,AG,AJ,AP,AQ,AS,AY,ES,GS,NS **4.0** Hrs.
1993 - 1996 FJ,LH **4.7** Hrs.
1995 - 1996 JA,JX **5.7** Hrs.
Supplemental Labor Operation No.'s
21-00-05-63 1989 - 1995 AS (Anti-Lock Brake System Equipped) 0.2 Hrs.
21-00-05-64 1991 - 1995 AS (All Wheel Drive Equipped) 1.2 Hrs.
If it is necessary to perform step 4, use the Labor Operation No. called out in the appropriate referenced Technical Service Bulletin.
FAILURE CODE: 52 - Improperly Machined