How much did you pay him already?
Skip if you can, or just sell it. You'd have to pay for a regear anyways. No point is going up to 4.10 from 3.73 as it's still an inadequate gear ratio. It'd also be sacrilegious to pay someone to regear a dana 30 to 3.73. Lower gears (4.56, 4.88's) in a D30 with 37's can be done if you're really light on the gas, and winch when it gets sketchy. 5.13's is asking for trouble.
Pick up a 44 (rubi, crate, whatever) and regear both axles to 4.88 (or 4.56 if you really do a lot of highway driving). You'll need the stronger r&p for those 37's if you're really trying to play on the blacks at Rausch and do sections of Rock Creek. I think Globex Performance is still running its special right now, $999+tax OTD for a regear (parts, labor,and fluids).
2015 JK- trussed and locked 44's, 37's, beadlocks, Synergy/Metalcloak control arms, Genright, Warn, Crawler Conceptz, Poison Spyder...blah blah blah
Last edited by BoraBora; 05-21-2018 at 10:19 AM.