I agree, just some added stress and tire wear, but not a colossal crisis by any means.

 

so, you think I should hold off until I rase my rig and put 33"s on before I get lockers?
I have no idea what lift set up I am going to do yet and I really do not ever want to go above 33" on tires ( Infact, right now I am happy with 31"s..but I also have no lift yet) I only want to go to a max of 2.5" of lift

 

I don't know, I'd probably go with the locker first, hands down that will give you the greatest increase in off-road performance. Getting a lift with bigger tires, will give you a bit more clearance underneath, but will also be a big cosmetic change as well, looks pretty darn cool after the lift.

You'll be able to fit 33's with 2.5-3" of lift with little or no rubbing after a little bit of work on the fender wells, nothing serious. A few of us run 33's (285's) without regearing the diffs, but you'll definitely notice the difference, the engine works harder to turn those big rubbers. Its not unbearable though, you just get used to it. The 4runner wasn't meant to be much of a speed demon. I would suggest installing a transmission cooler (not a bad idea, even if you don't go to bigger tires) for around $60.00 to keep the tranny from overheating if you go to bigger tires but keep the gearing the same. I would only regear if you were going to do both ARB lockers at the same time- to get it all done in one shot. Keisur, another yotatech member, went this route, going to dual arbs and new gears. I think RT is running 285's with stock gearing, he can chime in here as well.

 

But on the other hand if the ARB does crap out and disengage the locker while you are on a tough part of the trail it may leave you stuck.