I'm getting a 3x0-8 parts tractor from a buddy of mine. I plan on selling off the sheet metal and my buddy is keeping the motor. My intention is to use the rear end as a fathers day present for my dad to replace the Uni-Drive he has in his 1986 312-8 with 1,800 hours on it. His transmission is fine but it is having issues with the keyed axle and the hub assembly on his. He is in Western PA and I am 5 hours East In Lancaster County, PA so I can't just hop over. The pars tractor isn't a runner and my buddy bought it only for the mule drive so he has no idea if the rear end is good or not. I don't want to waste a trip and labor to install a potentially bad transmission. now, I'm assuming it would be involved to tear out my dads transmission and crack it open and replace part as needed. I believe a whole swap out would be quicker and easier on both our schedules. How do you bench test them? Is there a way with out hooking up a motor to it and running through the gears? I will most likely have it with me when I go to the Wheel Horse show in Arendsville, PA next month (along with rest of the carcass) Thanks in advance.