Challenger V6-3.5L (2009)
PROM - Programmable Read Only Memory: Customer Interest
A/T Controls - Harsh 4-3 Shift/Poor Shift Quality
NUMBER: 21-005-09
GROUP: Transmission
DATE: May 28, 2009
THE wiTECH DIAGNOSTIC APPLICATION IS THE PREFERRED METHOD FOR FLASHING ECUs.
HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS AVAILABLE BY SELECTING "HELP" THEN "HELP
CONTENTS" AT THE TOP OF THE wiTECH DIAGNOSTIC APPLICATION WINDOW.
THE wiTECH SOFTWARE LEVEL MUST BE AT RELEASE 9.05 OR HIGHER TO PERFORM THIS PROCEDURE.
StarMOBILE DESKTOP CLIENT, StarMOBILE STANDALONE MODE OR StarSCAN MAY ALSO BE USED TO PERFORM THIS
PROCEDURE.
SUBJECT:
Flash: Harsh 4-3 Shift And Shift Quality Improvements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Transmission Control Module (1CM).
MODELS:
2009
(LC)
Challenger
2009
(LE)
300C/300C Touring (International Markets)
2009
(LX)
300/300C/Charger
NOTE:
This Bulletin applies to models equipped with a 3.5L/5.7L or 6.1L engine and a NAG1 automatic transmission (Sales Code EGG, EZD, EZD or ESF
with DGJ) built before May 20, 2009 (MDH 0520XX).
SYMPTOM/CONDITION:
Some customers may experience conditions that could be described as:
i.
A harsh 4-3 downshift during light/moderate vehicle braking or deceleration. During light to moderate vehicle braking while decelerating or coming
to a stop, the driver may experience a harsh downshift into 3rd gear. The harsh shift is due to the inadequate pressure supplied to the apply clutch.
ii. Harsh or abrupt shifting during normal maneuvers while the shifter is in the Drive ("D") position, or the driver uses the shift lever to initiate a shift
via AutoStick or ERS.
DIAGNOSIS:
Using a Scan Tool (StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all transmission Systems are
functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the above symptom/condition is experienced or can be verified, perform the Repair Procedure.
PARTS REQUIRED:
