Seems like their target market is CRD vehicles running 35s (that's the equivalent tire size the necessitates 4.10s for the CRD gearing). And in doing so they're hoping to expand sales to anyone with 3.07 or 3.55s in the gas vehicles.

Basically just bones us guys with 3.73s since the jump to 4.10s, IMO, isn't even worth my time.... especially with the 5.7L.