The Chrysler A833 4 speed is one of the best shifting, most durable transmissions built. We cringe whenever we hear someone switched one out to a lightweight late model 5 speed. By adding the Gear Vendors Under/Overdrive you get several benefits that makethis an awesome transmission package. First, you get to keep the period correct trans, trans crossmember and shifter in your car. You are adding the strongest overdrive on the planet warranted for 2years even behind 1200hp and dragstrip use (no other transmission is going to guarantee that). The system installs with no more than a couple properly placed dents in the tunnel and can be put in without even those. Very simple install.
You can be boulevard cruising in 2nd and want to show off a little - just squeeze a little throttle and hit our button on your shifter for a clutchless shift and the same tire barking fun and performance the auto guys get. The hot setup in bracket racing is to flip the 3-4 side cover lever over so that 3rd is where 4th is nowand shift 1st, 1st-over, 3rd, 3rd-over and do the entire 1/4 mile with just one clutch depression. For most drivers we are not talking tenths of improvement but a full second on the watch.
There is also a wide ratio 833 trans with factory overdrive that was offered with 3.09, 1.67, 1.00, and .73 overdrive ration in the non-performance Darts, Satellites, etc. This wide ratio trans is horrible in the performance aspect but if you add a Gear Vendors you pick up a 2.40, 1.30, .78, and .57 double overdrive ratios. Makes for a slick 7speed trans that though is not quite as fast in the ¼ compared to the close ratio 833/Gear Vendors combo - does have a double overdrive gear for those guys running 4.88s in the rear.