COMPUSHIFT Mini Overdrive and Torque Converter Lock-Up Kit for Chrysler A500/42RH, A518/46RH and A618/47RH

Works great

This unit is filling a hole in the market, could be a little more affordable

Compushift mini

This system really is legit.I absolutely love it.you adjust the overdrive to shift when and where you want same with lock up and it just works. Dont waste your money with those vacum switches they absolutely do not work. This system actually works.

Mini3 for Chrysler 46rh/518

This thing just works! I tried using governor line pressure with hydraulic switches and Vac switch for kickdown and it does work but is unreliable and not consistent. This HGM Mini3 was simple to install and easy to get working, with one call to tech support about app setup and parameter settings I was up and running. Support is excellent, if I called during business hours the phone was answered in a few rings, very knowledgeable and easy to talk to. Harness length was perfect everything worked as it should. If you are trying to run an overdrive transmission on an older vehicle with non-computerized engine this is the only way to go. Shifts as it should and has easily adjustable shift points, even unlocks the torque converter when climbing small hills, it works perfectly! I would highly recommend this product; you will not be disappointed.