Not with 37" tires, or 35's either with the stock 30 front and 35 rear axles. And If you are going to go 35's or bigger, you would be better off replacing those axles with Dana 44's than upgrading the shafts, ring and pinion, etc. You should try and find a wrecked rubicon with the axles still in tact.

Superdawg will be able to give you the best advice about the axles.

Gun it and run it!
1981 CJ5,258,T-176,D300,AMC 20,Dana 30,Trxus M/T 31x10.50, Rancho 5000's, GroundPounderFab front bumper, polyethylene gas tank, aluminum dash, AutoMeter gauges

What this country needs is unemployed politicians.