We're replacing the rear main seal and track bar, and we've gotten the RMS installed and the bearing cap back on properly and the bracket back on the block. I then managed to get the pan back on after dropping the axle with no tires like we did to remove it. The pan will fit tight to the block in the front, but when I put the back in up where it should be, it's hitting something before it will seat all the way against the block. I didn't purposefully change the pickup tube or anything, so I'm not sure what could be hitting. It must be towards the back anyhow. It's off from the block by about a quarter inch. Any ideas?