quick question for the board. i have been a long time reader, but haven't yet posted. i tried searching but didn't come up with anything, hence my first post. forgive me if this has already been discussed.

i have a 2000 SR5 4Runner 3.4V6 4x4. the sticker on the door panel says that my correct tire size is 225/70/15, but when i bought the truck it had 265/70/16 deuler h/ts - which is what i thought were standard on the 3rd gen 4Runners. i recently bumped up the tires to destination a/ts 265/75/16.

my question is, does anyone know what my gear ratio likely is? i thought 4:10 was standard. and if indeed my truck did come factory with 225/70/15s, how big of a problem is it that i bumped up to 265/75/16s? do i HAVE to regear up to 4:33 or even 4:56 to not cause permanent damage to the tranny?

any help the board can provide would be much, much appreciated.

 

I do not see you causing any damage to the trany the only problem that you might have is the speedo being off and maybe loosing a little bit of power. I have 4:10 gears and I am running 35 BFG mudders which are 6 in. over stock for me and my trany is just fine.

 

Your transmission will be fine, it does not care what is on the output side. I went from 225/75R15 (standard) tires to 255/70/R15 to have a wider footprint versus the 'skinny' tires. Now I am going to 265/70R15 (time for new tires again) for an extra .40 inch of height because I destroyed a starter in high water.You'll be fine.

Be advised... if you consult your manual, 16" tires and rims are an option on many 4runners.