the only time I had that problem is when I tried using the blue hubs with the integy ball diff along with the stock dogbones... eh eh. don't work. A word of advice RikD, if you ever upgrade the differential don't get the integy one.. you'd have to get integy universal shafts (1 of 2 types they make) plus you have to use the "other" hubs they make, or the stock hubs. Integy is a PITA.