I think your choice is between 4.88 and 5.13. If you can't find anything to drive with your engine/transmission, 37's, and those gears to compare, you'll have to take what I call a leap-of-faith decision. I was between 4.56 and 4.88 for my 35's, went 4.56 on faith and it worked out perfectly. Good luck.
PS................based on your opening post, I think 4.88 is your probable best gamble.
2013 JKR, Auto, Yukon 4.56, Goodyear MTR/K 35/12.5/17 on XD222 KMC Enduro Beadlocks,Teraflex Big Brakes & Spare Carrier, Warn RC Winch, Metalcloak Front & Rear Bumpers, Metalcloak Overliner Flares & Front Inner Fenders w/ Corner Guards/Tail Lamps, Metalcloak Game Changer 2.5" w/6-Pac's, ARB Diff Covers & Onboard Air, AFE High Tuck Muffler, Front Lower Control Arm Skids, Artec Aluminum Skid System, Poison Spyder Hood Vents, Ripp SC.
There are no winners here; just beguiled participants
Last edited by ratchettt; 04-13-2015 at 10:31 AM.