hello all--I have a JD 302-A tractor w/reverser. also can get a 301 parts tractor [no reverser]with bad motor. The 302A has been worked hard as a loader tractor, and its got some real serious ''pop'' clanks'' when you change directons & general gear noise, no brakes. the donor tractor has nice powertrain. my plan was using this part of 301. I don't think of problems with changing out reverer packs, etc- what about removing reverse, installing park in 301 transmission? also are ratios the same. I may be going about this wrong, & need to transfer diff-planetary,etc the other direction. thank you for any input---