Jeff's 727 rebuild thread

Yep. Trail Beast is right on the money with this. The grooved input shaft with a yellow paint marking is mentioned in both Carl Monroe's & Tom Hand's books as being a heavy duty part usually fitted to 440 Six Pack, 426 HEMI & some 401 AMC transmissions. Who knows what other nice surprises you may find once you get inside it. Maybe 4 pinion planetaries?? I'm watching!!