If you experience rough shift and/or shuddering during gear shifting, software updates to the powertrain control and transmission control modules (PCM and TCM) are available which may address these problems. On higher mileage vehicles, a mechanical failure may exhibit similar symptoms. Proper diagnoses should be performed before any repairs or software upgrades are attempted.
Car Problem Reports
Chrysler 300 PCM/TCM Software Updates Will Address Shifting Problems
Chrysler 300 Problem
Drive Trains Affected: 2WD, 4WD
Average Mileage: 63,342 mi (39,000 mi - 99,800 mi)
Shudder or vibration around 40-50 mph. This car shifts into overdrive before 40 mph. I believe that it should shift into OD above 45. Will go after the PCM/TCM software update. 3.5L V6, auto.
Trans shop diag it as torque converter clutch. est $890.00. Dealer stepped up and diag it as trans. Replaced it and reprogrammed PCM/TCM and did a relearn all for free. All is well. Chrysler sales managers can get stuff done.
The drive shift would not change to the next gear. Car would not go over 20 mph and check engine light along with
ABS/BAP light would not go off. Dealership updated software last year and still the PCM went out this week. Dealership changed PCM for 490.00. I think this should be under factory warranty.
Visitor, 2005 Chrysler 300, 2WD, 62,000 mi
the pcm tcm problem repaired by dealer cost 100 dollars ded. because covered under factory warranty up to 75000 miles
Visitor, 2006 Chrysler 300, 2WD, 99,800 mi
Transmission shudders when downshifting as coming to a stop.
Visitor, 2006 Chrysler 300, 2WD, 60,000 mi
The car shakes/shutters around 40mph. After a while the car would not shift after 3rd gear. My lights started coming on and off on their own as well as the AC did not blow cold air either. I let the car sit for a while and had to call AAA to jump start the vehicle. The AAA driver advised needed new battery. Once he put the new battery in the car ran fine for a while and the problems all cam eback. Brought it to a machanic and they think its the computer.
Vehicle slow and sluggish when accelerating from stop, red ttcking warning light blinking