I had a lot of tread left on my mud terrains, but about two months ago I jumped in the 87 4runner & it seemed like I was all over the highway. Prior to this I noticed my steering stabilizer was leaking slightly.

I hadn't drove it in a few months, so I figured it was me. I then let my buddy drive it for about a month & it came back with both inside front tires worn down to nothing. It's been sitting for about a month & I am pricing two new muds & an alignment. Do you guys think its just an alignment issue?

I replacement front shocks, ball joints & cv shafts last year.

Might be too much toe out, easy to check with a tape measure between the front and rear of the front tires.

Could be your upper and lower A arm bushings are worn out. Also check your idler arm and TRE's

Just did a bushing R&R Read away

When these ol' gals start getting this old, they need some good old fashion maintenance.

Outside measurement on the front of the tire is 71 3/4".

outside measurement on the back of the tire is 70 1/4".

I did some reading & it looks like anything over 1/8" on toe out will cause the tires to scrub. Is this true?

I know I need to replace the bushings soon, but it will have to wait for another day.

Yes, that is way toed out:

http://www.4crawler.com/4x4/CheapTricks/AxleTech/index.shtml#Alignment

Ouch! <img src="/forums/images/graemlins/zombie.gif" alt="" /> <img src="/forums/images/graemlins/zombie.gif" alt="" /> It has gone beyond toe'd out to outright spread eagle.

Is there excessive slop in the joints/bushings? Otherwise would be looking for something bent to be that far out...

Okay just got some new muds on the front.

Idler arm is shot! I just picked a new one up & I am going to put it on & then work on toe-out. I think the bushings on the arms need to be replaced also... that's going to have to wait for another day & I need to repack the wheel bearings! <img src="/forums/images/graemlins/barf.gif" alt="" /> <img src="/forums/images/graemlins/scared.gif" alt="" />

What are the Negative Camber tolerances?

I have also noticed mine front tires have negative camber for a while & not sure what the tolerances are...

it's 50 7/8 toe in & 50 3/8 toe out inside tire. My daughter helped me measure in the dark this morning & she didn't hold the tape on the outside very well! <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

All of that info is in the FSM sticky at the top of this page. It is for a 93 but the IFS specs were the same from 86-95.