hey guys here is what terry told me on the deal with the zetec gearing...
You need TWO gears to change an FDR..the ring gear(it gets smaller less teeth)AND the new OUTPUT SHAFT AND GEAR...that gear gets BIGGER..trying to make a Zetec ring gear mesh
with a V6 output pinion ..won't work wrong size,wrong
teeth count,wrong teeth pitch!...you need TWO gears to change an FDR on an MTX75 NOT JUST THE BLOODY RING
GEAR!...Have a good day!!! TH
so i would take terrys word for it. the brit knows his transmission.