I have an 87 Komatsu D37-P2. I was doing some dozing the other day, and the right track bound up. I put it in reverse and it was free. Went about 6 ft and it bound up again. Put it in forward and it was free. Went 6 ft and it bound up again. Thought maybe i had a rock wedged in it. Got off .. looked , nothing found. Reversed it again and it was free. Figured i better get closer to the house.. Forward again, but noticed not much steering. ( not that it was great before ) Touched the left pedal and the right final drive started making noise. Sounded like it was skipping on the splines or something. Drove it 20 yds. and parked it, and noticed oil running out on the ground. Upon closer inspection, i found a hole in the final drive housing near where i assume the bearing sets on the pinion shaft, with a piece on metal poking out of it... that isn't supposed to be there ! Looking for opinions and thoughts from you guys. I'm looking at doing the work myself. I have never worked on a dozer before other than changing some rollers and fluids. I only have the basic hand tools. Do i need anything special to get it apart ? And is there a good place to get parts from ? I'm sure i can't afford OEM parts from a dealer... Any help and insight would be appreciated.