Looks like the 2011 and up has the Sterling 10.5 with a new 37 spline rear and since its so new the only gear options that are out there match the current stock options up to 4.30. Anyone catch any wind on when and who will come out with aftermarket gears for this so I can re-gear up to 5.13 or so. Thx.

 

Just curious, what do you need 5.13s for? I don't have many miles on mine yet but even the 3.55s with the new 6-speed seem to be adequate for towing with the 6.7L. Are you doing competitive pulling or something?

 

I have the Gas engine and big tires and the truck works too hard to get rolling, even with 4.30 gears. Doing some offroading too. So 5.13 is the wrong target?

 

I hate to wake a dead horse but has anyone found a soultion to this? As the OP states the deepest you can get for the 37 spline is the 4.30 offered from the factory. I'm interested in running the older style gear set (31 spline) because i need deeper than 4.30. The question would be, is it possible to use the the 31 spline pinion in the new housing with the correct bearing and flange? The carrier issues are known and covered with what bearings are needed. The gear vendors don't know and are no help. I can't be the 1st one to possibly try this.