The A500 (also known as the 42RE) is a modified version of the A904. Introduced in 1989, this was the first light duty Chrysler 4 speed automatic. The majority can be found on trucks and vans, but are known to run with smaller vehicles as well, the Aston Martin for instance. Monster provides a selection of builds for the A500 transmission with each level having a higher rating for torque and horsepower.