UpFix hopes repairers will think twice about replacing transmission control modules in the event of failure and opt for a repair.
In a press release, UpFix says it focuses on failures in Allison automatic transmissions that are susceptible to symptoms like hard shifting, limp mode in third gear, and vehicle immobilization.
More from UpFix's press release:
Documented Allison TCM failures affect 2009-2015 Chevrolet/GMC 2500/3500 HD trucks, some 2008 and 2009 Chevrolet Kodiak and GMC Topkick C4500-C6500 vehicles. UpFix professionals conducted hours of post-mortem inspections and found the internal failure source.
Specifically, heat and vibration cause the TCM’s circuit board conformal coating to fail and leads to transmission shifting issues, many of which started surfacing just a few years after the affected vehicles hit the roads. The Allison TCM is used with Duramax diesel engines with engine RPO codes LBZ, LMM, LML, LLY, and LGH. The Allison A50/T14 fourth generation TCMs have the highest failure rate.
