I recently swapped out my original open rear-end carrier with a used posi carrier. I am not sure what year it is from but it is an 8.2 like the stock one. 2 questions, I have it in now and drove it tonight but I notice awhat sounds like gear noise that was not there before. Could it be because the ring and pinon are not meshing exactly the same as before? I had to shim it a little different than it was,( all I changed was the carrier I kept the same ring and pinon) or the other thing I noticed when I put the axles back in is it seemed to need a little help to get the 4 bolts that hold the axle in, almost as if the axles were meeting some resistance in the posi carrier. Does anyone have any knowledge in this area? Thanks