I bought a 970 Case with Powershift last spring and put a Case 80 loader on it. It has a cab. Before I bought it, the farmer I bought it from had the transmission rebuilt. I checked with the dealer who did the repairs and it checked out plus doesn't have that many hours (probably 100) on the overhaul. It has worked fine until this afternoon. We have had extremely cold weather here in Central WI, but I haven't had to use it for moving snow for probably 3 weeks. I know it takes some warming up to get it to shift out of the first gear when it is cold. It has a block heater. I started it, raised the loader, moved it a foot or so, and then I backed it up. Then it wouldn't move. I let the tractor run for close to an hour with still no luck. Nor will the loader lift or the bucket tilt Any suggestions would be appreciated. Our temperatures today were in the mid-20's. The tractor is in a shed all the time.