Wondering if anyone with a hemi is running 5.38 gears and 37s. Reason im asking is I have a built up set of rubicon axles with 5.38s all ready installed. Currently have 5.13s in stock sahara axles so not to big a jump to 5.38s
Thanks

 

I am running 4.56 gears with 35s and there are times I wish I would have left the 4.10 gears in.

 

I have 38s and a hemi with 5:13 gears. 5:38 would be a little low but do able. Here in SoCal I hit 75-80 mph on the freeway regularly. How fast do you want to drive? If 70 is fast enough the. You will be. Fine.
This is all assuming you have a 545 rfe trans

 

would also depend on year of the 545... 2006 and up has 0.5:1 5th gear. 5.38's at 80 is only 2000rpm with 37's... according to grimm's calculator.