I'd do it simply because of the added driveline load. Jeep saw fit to reduce the std Rubicon gearing, for example, 10% for the diesel...so I'd stick with that personally. So I'd be looking for 4.56 low side or 4.88 high side for the JTRD with 37s. Whereas for my gasser those gears are 4.88...
I actually DID do it over again.
Changed - color, radio and proximity sensors.
Tried to go pretty basic the first time and regretted a few options I left off. And I hated the silver pretty quickly.
So now? Nothing. I love my setup. and will keep going.
There are 4 rules that I live by: never get less than twelve hours sleep; never play cards with a guy who has the same first name as a city; and never get involved with a woman with a tattoo of a dagger on her body. Lastly...NEVER buy used Jeeps. They're bad enough new. Now you stick to that...