DogBiscuit

I had a flat last week on a rear wheel didn't notice until I got home which sucks.

Anyways I had it replaced because I didn't want to trust the softer sidewall even though there was no breakdown on the inside of the tire.

The tread difference between the new tire and the old tire (same brand/model/size tire) is about 1-3mm is this too much of a difference and going to cause LSD problems? I've driven it a bit and don't notice it driving any different but the last thing I want is to destroy the rear end because of one tire having a little more wear than the other.

Billman250

It is very possible.

Do a wide open throttle on a straight smooth road in 2nd gear, then snap off the throttle.

If the back of the car feels like its shifting side to side, then yes it will be a problem.

DogBiscuit

thanks billman. this is what I needed.

i'll test it otw home. if it's theproblem i'll have that one replaced as well.

redlineracing

IMO...unless you have a new tire that blows,I always replace both tires on the same axle.

\rlr
Carolina

Car Analogy

You can also shave the good tire down. Tire Rack does this if you tell them how much to take off. Can do your own home grown with cheese grater. Axle in air, car very safely secure, car idle in gear, grate.

Be very careful though, easy for it to fly oit of your hands.

Depending on how tread left on tire that would otherwise be replaced, this may or may not be economical.

Billman250

Be even more careful not to get anything or any body part caught in a moving car wheel, there will be no going back to working on cars ever again.

DogBiscuit

It was walking when I tried the test.

I got a new tire on the other side. This resolved the issue however I did drive to work once on it ~25 miles round trip. mostly freeway driving but I may have given it the beans 3-5 times.

Should I expect my LSD to explode now?

Nothing seems any more wrong since the change and I drove it pretty hard yesterday for schnitzengiggle.

I've always had a problem during cornering where my LSD seems to make some loud clunk/grinding noise at times, at first I thought this sound was CV Cups but those have been swapped and spacers added and the cups didn't have any visible wear when swapping. The sound seems to happen when cornering under no load or when under light load, never under high load. It also seems to go away when the diff is good and warmed up. This was happening before the tire incident and I made a change from mobil 75w-90 to Motul 90PA about 3 weeks ago and it alleviated the problem a little bit but it still happens occasionally.

Axle nuts are torqued to billion ft/lb.

B serious

My diff clunked on no-throttle U-turns or sharp radius turns. Turns out the gears inside were chipped/cracked...and the two axle flanges were pretty much locked...like a welded or locker diff.