Buddy of mine bought a Yukon aluminum bolt through center section, Daytona aluminum pinion support, a 35 spline spool, a Yukon install kit, and a set of 5.13 gears from Quick Performance. So we went to put it all together last Thursday. Set up the pinion support and start to put the carrier in to set the pinion depth and back lash. The ring gear hit the carrier in the pinion pilot bearing area way before it got even close for the backlash. Would have had to take a lot of material off the case to make it work but didn't want to do that. The ring gear didn't have a chamfer on toe side of the ring gear like all my pro gears have had. The gear set came in a plain box, and is a street gear small pinion. No way this gear set goes in that third member. Anybody else ever run into this problem?