Has anyone ever had to change the u-joint off the gear box going to the rear diff? (in my case the middle diff). I had just pulled my trailer up Monument Mountain and went back down to pull my nephew’s trailer up when about half way up (in the steepest part) the u-joint had a catastrophic failure. My brother who has a 6x6 also, came back and helped me maneuver back down to a pullout on the trail. I tried for 4 hours to remove the drive shaft completely, but was unsuccessful, but I did manage to remove the front u-joint from the drive shaft via the slip splines. I tied the shaft to the frame so it could still spin but not flop around and cause damage. In the meantime my brother and his son & grandson took the trailers to the trail head, but just short of that he noticed some noise and upon inspection, the rear u-joint on the same shaft on his 6x6 was failing, he was able to limp in the rest of the way. He returned on an Artic Cat 500 and his grandson on an Artic Cat 650. We aborted the attempt at Monument and when down and back through Camron Pass, about a 5 hour tow through some nasty stuff, quite a bit of it was a double pull, but we finally made it.
Don’t know if there is any other damage, there was no oil leakage, and I did drain the gear box oil and it was clean. The problem I have was after the drive shaft was secured I put it in 6x6 and the front tires pulled me forward and in reverse, but when we started out, that quit working. There was a small clicking noise when being pulled.
Haven’t gotten into it any further yet, but what little research I’ve done it looks like I will have to pull the engine to do this job. If anybody had every done this before, any pointers would be welcome.
And yes I greased it prior to this trip.
Don’t know if there is any other damage, there was no oil leakage, and I did drain the gear box oil and it was clean. The problem I have was after the drive shaft was secured I put it in 6x6 and the front tires pulled me forward and in reverse, but when we started out, that quit working. There was a small clicking noise when being pulled.
Haven’t gotten into it any further yet, but what little research I’ve done it looks like I will have to pull the engine to do this job. If anybody had every done this before, any pointers would be welcome.
And yes I greased it prior to this trip.

