Glad you asked!

The New Process A578 M/T in these cars has proven to be practically bulletproof in our own cars, as well as customers' cars. Our Neon and Eclipse make 1100 HP combined, and through hundreds of dragstrip passes and tens of thousands of street miles, we have experienced zero problems. The Neon has a Quaife limited slip diff, the Eclipse still a stock diff. We have good reason to believe this box is stronger than the Mitsu FWD gearbox in the 4G6 factory turbos, as we have seen more failures with the Mitsu 'box by far. And no crankwalk either, for further reasons why the 420A is an excellent, if not superior, alternative to the 4G6!

Auto trans in these cars benefit from the fact that they are derived from the older RWD Chrysler A727/A904 series transmission. Strong in stock form, they can also be built for higher than Stage II power levels should you desire.