Re: 3.73 gears
You may want to look at some of the STR8 forums, but it does not seem that the aftermarket is making any gears in the new metric size, just not any demand. Some of the WK owners swap out with ford axles (~$5000), which are solid and won't work for the independent axle WK2.
If the CRD uses a different axles/dif housing than the STR8, never mind.
2011 WK2 Overland Mineral Gray/Black, Advanced warning, V8; 2009 KK Rocky Mtn V6; 2000 WJ Laredo I6; 1979 CJ7 I6... green... miles of smiles :)