I have a 2014 ram 1500. I put on a 6" lift and 1.5 body lift. I have 20" rims. Looking to go 37's. It has the 3.21 gears, but was contemplating getting a 3.92 front carrier. You can get a stock unit for 500 or less. It's a quick swap. The rear would be setup by a shop with an lsd installed with the new 3.90 gear. Would this be ok? Is there any difference in axles splines between the two stock gear ratios? I have the 8 speed.