I am helping a friend of mine split and install new clutch, after splitting tractor we found the Hupp overdrive had an issue with a previous owner. The snap ring is spot welded in place due to the casing is broke that holds the snap ring. I have never worked on a Ford, I have IH's, so alot of this is new to me. The very small gear on the overdrive is missing over half of it's gear teeth, is this overdrive assembly available,for sure we need overdrive housing, small gear, is the small gear the high side of the overdrive? All your help on this is appreciated!!....Thanks for all your help....Binderman