Anyone tried this to get the lower 3.06 first gear in an E4OD/4R100? The hard parts look to be very similar between the 4-spd & 5(6)-spd. that it wouldn't suprise me if they are interchangeable, unless the rear output shaft is a different diameter or spline.

Has anyone had 5R110 & 4R100/E4OD hard parts out side-by-side to compare them? I'd be interested in hearing exactly what's different and what's the same.