Gears & Axles - Ring Gear Binding Every 180 Degrees?

I just had my posi break on my 10 bolt. So I bought another one (same style unit) and swapped it out. I used the same ring gear and shims from my old setup. When I torque the caps to 65ft'bs the ring and pinion seem to bind every 180 degrees rotation of the ring gear. I can still turn it past this point, but it is real tight. Anybody have any thoughts? I also tried to swap the shims from side to side in case I had them mixed up, but the same thing occured.

Are you certain you have all of the ring gear bolts torqued properly?

Flange run out or debris under the ring gear when it was mounted...... might also have some pinion run out, but I bet its related to the ring side of things.

Take the ring off, wipe the flange clean. Install and check run out before and after you re-mount the ring gear to the differential.

I went ahead and bolted the ring gear back on the old posi and installed it. The old posi had no bind. I then put the ring gear on the new used posi and it was binding again. I am going to install new bearings on the new one and see if this is the problem.

sounds to me like the flange on the posi is out of tolerance.

bolt it in and find a dial indicator. This will tell you how much runout you have on the ring gear.

Well I put new bearings on the carrier and reinstalled it with no problems. Can't explain how bearings would of caused the problem, but I guess anything is possible.