In 2009, the Aisin 6-speed automatic (AS68RC) became the gold standard for heavy-duty hauling, specifically paired with the . It was designed to handle higher torque loads than the standard Chrysler-built transmissions of the era. Cummins Diesel Forum Key Performance Specs
: Specifically engineered for the "High Output" Cummins engine, managing over 650 lb-ft of torque in 2009. asian tranny 2009
: The external wiring harness between the transmission and its computer is poorly protected; if damaged by road debris, it can trigger "limp mode." In 2009, the Aisin 6-speed automatic (AS68RC) became
: Known for a "seamless" feel where the torque converter locks up in almost every gear to reduce heat and improve efficiency. Pro/Con Analysis ✅ The Good : The external wiring harness between the transmission
: At roughly 209 lbs for the unit alone, it adds significant mass to the vehicle's powertrain. Wikipedia Reliability Summary
: Excellent thermal management compared to the older 48RE or 68RFE models.