I have a 2.5L with the stock 4.10's and I'm putting some 265/75/16's on. Will I need to regear or will it be ok? I haven't been able to find much about regearing with my 4 cylinder.

 

I didn't mention I have the ax5 manual transmission. I don't know how much it matters.

 

Honestly I wouldn't regear. 4.10 and essentially 31's is the sweet spot, Spend the money on a 4.0 and a ax15 and you will be in heaven :P

 

Sounds awesome. I was actually planning on a swap eventually. Would you really swap to a 4.0 and not a 350 though?

 

A 4.0 swap may not be cost effective unless you have extensive modifications into the jeep, i.e. caged, upgraded axles, coilovers. A swap may cost as much or more than a decent XJ with a 4.0 and AX15.

You'll basically need a whole jeep as a donor. Radiator, computer, and wiring are just the tip of the iceberg. You may as well bump up to a smallblock V8. The GM 5.3L would be my personal choice

 

What?

You could get a running drive train and all the junk you need from a donor Jeep for pretty cheap... If you are running CO's on a 4cyl, you're and idiot anyway.

If you go ahead and swap a V8 in, go with a newer 5.3 with the Vortec heads with EFI. Running a carb in an offroad rig that sees steep climbing and off camber situations is also stupid.

 

Would you swap a 4.0 into a 4cyl jeep that has little to no modifications? When you can sell it and get one with a 4.0 for almost the same price?