I actually have the 4.06 ring and pinion out of a post 2000 MTX-75

I had some focus guys looking at the combo, as some of them swap in the 4.06...

Either way, ford did get rid of the splined pinion gear, now it's a one piece with the shaft.

99 Cougar V6 MTX...Plenty of mods My best mod thus far: Trans: Brand New MTX-75 with B1 gear set, Quaife LSD, 4.5 Final Drive, Spec Stage 1 Clutch, Spec Aluminum Flywheel...