[Greg Reimer 7376]

On the late 70's-early 80's 10 bolt, there was a tendency for the axle retaining C locks to get wallowed out and a bit thin in use with the result of them falling out, then the tire,wheel,brake drum and axle would come out while the car was going down the road. Not a happy scenario.If you need that last little bit to get the spider gear post in,thin down the end of the axle a bit-not over .010" at a time, then try again. Be sure the C lock groove on the axle and the C locks fir snug-sometimes axles show that they are getting wallowed out from a bunch of loose motion between them. Make sure the C locks aren't worn thin or bent or they might be able to slip out as well. If the axles and the C locks are nice and snug, try thinning down the end of the axle a little at a time so as to maintain a minimal clearance there. You want axles that exhibit as little endplay as you can get to eliminate stuff getting looser with age and use and coming apart. This works on a 12 bolt as well,both rear ends are quite similar. Keep the spider gears snug in the differential carrier as well, too much looseness results in issues as well, but you don't want them so tight that lube has a difficult time getting in between parts that need it.