4:56 VS 4:88...been there..done that

[BillyGoatMTB]

I ran 315's for 20 years with 4:11 and it did fine on the highway, it was just sluggish off-road and needed a lower gear but works unless you do a ton of off-roading. If your going both T-case low gears and differential gears I would go the T-case first(low range only) and see what you think. I didn't try my 315's with the new 4:88 gearing but the 37's are spot on with the speedometer and a little sluggish around town(probably just because they are so damn heavy) but feels good on the highway. If you do a lot of highway driving I think the RPM may be a bit high on the 315's, no proof, just my .02. This way you get the low gearing you need on the trail and high gears for the highway. And maybe not now but when you think you may need 37's you don't have to re-gear the diff's. It's not cheap and why do it twice? I said I would never go 37's and here I am.... I don't do extreme off-roading either, the 315's just start looking "small".
I know its not a 37's topic but just helping you look into the future lol.

Super appreciate all the comments, input, opinions and data

Haha, the 315's do look small now