Dave installs the Allison transmission-control module in the engine compartment, next to the brake booster, and feeds its wiring harness down into the transmission tunnel.

Comparing features of the latest stand-alone automatic transmission control modules. Which one will work best for your transmission? Jeff Smith breaks it down.

The installation of an aftermarket five speed transmission has always required some cutting and modification—until now. Passon Performance adds a gear to your Mopar with their 855 5-Speed ...