A/T - Harsh Gear Engagement/Upshifts/Downshifts
NO.: 21-36-93GROUP: Transmission
DATE: Dec. 10, 1993
SUBJECT:
Improved Transmission Shift Schedule
MODELS:
1993 - 1994 (AA) Acclaim/Spirit/LeBaron Sedan
1993 (AC) Dynasty/New Yorker/New Yorker Salon
1993 (AG) Daytona
1993 (AJ) LeBaron Coupe/LeBaron Convertible
1993 - 1994 (AP) Sundance/Shadow
1993 - 1994 (AS) Caravan/Grand Caravan/Caravan C/V
Voyager/Grand Voyager/Town & Country
1993 (AY) Imperial/New Yorker Fifth Avenue
NOTE:
THIS BULLETIN APPLIES TO ALL 1993 VEHICLES AND 1994 BUILT PRIOR TO MDH 09-30-XX EQUIPPED WITH THE 41TE TRANSMISSION.
SYMPTOM/CONDITION:
Harsh engagement with tip-in during low speed 2/1 coastdown shifts. Low speed harsh 2/1 kickdown shifts. Harsh 3/2 and 4/3 coastdown shifts. Harsh 3/4 upshifts. Harsh stationary Neutral/Drive garage shifts. Park to Reverse noise (grunt).
DIAGNOSIS:
Using the Mopar Diagnostic System or the Scan Tool (DRB II) with appropriate diagnostic procedure manual, verify that all engine systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order for future reference, and repair as necessary. If no codes are present and all systems are functioning correctly, proceed with the following repair.
PARTS REQUIRED:
1 4686478 Transmission Control Module
AR 4467721 Transmission Fluid - ATF Plus (7176)
REPAIR PROCEDURE:
This repair involves the replacement of the transmission control module with a module that incorporates revised software, changing the transmission fluid, setting the pinion factor, and transaxle quick learn.
1. Using a DRBII, program this Technical Service Bulletin Number (21-36-93) into the TCM that is currently installed on the vehicle. This is accomplished by choosing the TSB option under Adjustments.
NOTE:
THIS STEP WILL BE ELECTRONICALLY VERIFIED WHEN THE MODULE IS INSPECTED AT THE RETURN CENTER.
2. Replace the transmission control module with the new module, following the procedures outlined in the appropriate service manual.
3. Change the transmission fluid following the procedure outlined in the service manual.
NOTE:
USE ONLY MOPAR ATF PLUS TRANSMISSION FLUID (AUTOMATIC TRANSMISSION FLUID TYPE 7176). USE OF DEXTRON IIE MAY CAUSE CLUTCH SHUDDER.
4. Start the vehicle and with the gear selector in Overdrive, move the vehicle at least five feet and then place gear selector in Neutral.
5. Using the procedures listed in the service manual complete the following:
a. Quick Learn Procedure
b. Electronic Pinion Factor Procedure
6. Drive the vehicle at least 10 miles.
7. Change the transmission fluid again following the procedure outlined in the service manual.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE
Labor Operation No. 08-19-06-90 2.1 Hrs.
FAILURE CODE: AM - Authorized Modification