A/T - Clutch Volume Index QuIck Learn
NO: 21-09-96GROUP: Transmission
DATE: June 28, 1996
SUBJECT:
Clutch Volume Index Quick Learn Procedure Requirement After Transaxle Overhaul Or Replacement-41TE Transaxle
MODELS:
1989 - 1992 (AA) Spirit/Acclaim/LeBaron Sedan
1989 - 1992 (AC) Dynasty/New Yorker/New Yorker Salon
1989 - 1992 (AG) Daytona
1989 - 1992 (AJ) LeBaron Coupe/LeBaron Convertible
1992 (AP) Shadow/Shadow Convertible/Sundance
1990 - 1991 (AQ) Chrysler Maserati TC
1989 - 1992 (AS) Town & Country/Caravan/Voyager
1990 - 1992 (AY) Imperial/New Yorker Fifth Avenue
DISCUSSION:
NOTE:
FAILURE TO PERFORM THE QUICK LEARN PROCEDURE OR BATTERY DISCONNECT, AS DESCRIBED BELOW, AFTER A TRANSAXLE IS REPLACED OR OVERHAULED CAN RESULT IN A LOW MILEAGE TRANSAXLE FAILURE OR POOR INITIAL SHIFT QUALITY.
The DRB III will now support the quick learn procedure for the 1989 thru 1992 Model Year Vehicles equipped with a service replacement EATX II (with cooling fins) Transmission Control Module (TCM) having the following part numbers:
4796121, 4796122, 4696123, 4696124.
For EATX II TCM part numbers that precede the above list, refer to Repair Procedure No. 1 of Technical Service Bulletin 18-24-95, dated June 23, 1995.
NOTE:
1993 AND LATER 41TE/42LE TCM'S HAVE ALWAYS BEEN QUICK LEARN CAPABLE.
For EATX I (without cooling fins) TCM's, disconnecting the battery for one minute or performing the battery disconnect function with the DRB will reset the clutch volume index (CVI) to an acceptable range and the quick learn procedure is not required.
You must use DRB III code version 19.2 (released on Mar. 1, 1996 with TIL disc 1102) or later in order to be able to quick learn 1989 thru 1992 model year vehicles. Quick learn must be done on any 41TE or 42LE equipped vehicle when the transmission has been replaced or where transmission work has been performed which affects CVI. For example, clutch pack replacements.
NOTE:
THE READING OF EATX DIAGNOSTIC TROUBLE CODES (DTC'S) AND PROPER DIAGNOSTICS FOR 1989 THRU 1992 MODEL YEAR VEHICLES MUST BE PERFORMED USING THE MDS AND A DRB II WITH THE APPROPRIATE CARTRIDGE OR DRB III, OR USING A STAND ALONE DRB III WITH THE SUPER CARD INSTALLED.
AFTER PERFORMING DIAGNOSTICS YOU MUST ERASE ANY DTC'S USING ONE OF THE TOOL CONFIGURATIONS LISTED ABOVE BEFORE PROCEEDING WITH THE QUICK LEARN PROCEDURE.
PROCEDURE:
The EATX II quick learn procedure is required whenever a transaxle is repaired or replaced.
1. Ensure the transmission fluid level is correct.
2. Start vehicle, place the shift lever in Overdrive (OD), move the vehicle at least five feet with the engine running and then place shifter in Neutral (N). Apply the parking brake and let the engine idle. This purges the air in the clutch circuits to prevent erroneous clutch volume values which could cause poor initial shift quality or a low mileage transaxle failure.
3. Using the DRB III select the 1994 - 1997 Diagnostics option (1) and choose Transmissions.
4. Choose the Trans Overhauled/Replaced option and follow the instructions on the DRB III screen.
NOTE:
AFTER PERFORMING QUICK LEARN USE A PROPER DIAGNOSTIC CONFIGURATION TO READ THE DTC'S. IF ONLY DTC 12 EXISTS, ERASE THE DTC. IF THERE ARE OTHER DTC'S, PERFORM THE PROPER DIAGNOSTICS FOR THOSE DTC'S.
POLICY: Information only