The turbo clutch used a heavier flywheel. But in 92 (IIRC) Toyota went to the turbo flywheel for all the 22RE's. Marlin sells a replacement flywheel, that will fit the turbo clutch, which is 9/16" larger in diameter. And the clutch is different between the two, but either one can be used. I have a 22RTE truck, but I swapped out the 22RTE for a 22RE, and retained the R151F trans. And I used the turbo flywheel, and a 1,200 lb clutch from Marlin. But I wish I had gotten the 1,600lb one.
