skucera said:The Torqueflite 727 was made by Chrysler. It was arguably the best automatic transmission of the Sixties and Seventies. And, yes, it is American.
These transmissions aren't limited by power so much as they are limited by torque. I've heard that the 4HP22 used in BMW's, Rovers, and Mercedes-Benzes can take about 340 Nm maximum, or about 250 ft.-lbs. BMW had ZF design a new transmission for the then new 750iL's V-12, the 4HP24-EH, to handle that engine's 300 ft.-lbs. of torque.Pancake said:Not to threadjack, but it seemed related. How much power can the 4HP22 take? I've seen E30 guys running turbo 2.5-2.7 liter sixes on them, and know they also stuffed it into the old 745is, but have also heard they frag at the mid 200 ft/lb level (which is odd, since the 745i is a turbo 3.5 making well north of that). Also, that's turning lighter vehicles with smaller tires. I suppose I should ask how much can it take in a RRC