I recently purchased a set of 37 inch BFG Krawlers and plan to upgrade from my 35 inch mud tires.

I've got the lift installed and trimmed fenders.

I've also got the C-gusset upgrades for the front.

My question is, if I can only afford to upgrade one set of axles to chromoly to start, should I do the front axles or the rear axles?

 

Rear axle shafts. Those flanges bend so easily. The fronts will be fine for quite some time.

 

Yes, the rear.

 

Even Cromo splines will twist if your playing hard...37's need 60's for playing hard.

 

Yes I realize that. I don't play that hard and am not afraid to pull line when needed.