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.Google+
Car Problem Reports
Chrysler 300 PCM/TCM Software Updates Will Address Shifting Problems
Chrysler 300 Problem
Drive Train Affected: 2WD
Average Mileage: 62,333 mi (8,000 mi - 102,000 mi)
Visitor, 2008 Chrysler 300, 2WD, 102,000 mi
shifts hard and has had repeat problems with being stuck in second gear.
Visitor, 2010 Chrysler 300, 2WD, 24,000 mi
This s/w fix was made to my 2010 300s. The issue, for the most part, subisided. Once in awhile I'll still get the 'clunk' noise from the trans.
Visitor, 2014 Chrysler 300, 8,000 mi
Software updates did not repair shifting issue!!!
2008 LX 2.7L Chrysler 300 that will have hard shifts when driving over 40mph.
Visitor, 2008 Chrysler 300, 2WD, 66,000 mi
rough shifting up gears