Okay some of you know I had nails in my left rear tire. I had it replaced. the tread is still good on the remaining tires (about 3/4 worn) but not new of course.

When I accelarate the car now pulls slightly to the right and when I take my foot off the throttle (and decel) it pulls to the left.

Why?

(I'm not a mechanical engineer, I'm electrical )

 

Simple answer. The air in the old tires is old. The air in the new tire is new.

You should have put new air in all the tires.

 

<---NOT an engineer! But it would seem like more rubber=more traction?

 

Left tire (new) has a rolling diameter of 24.9", right tire (3/10" tread left) has a rolling diameter of 23.5". Under throttle the left tire is pushing harder (since the tires are going nearly the same speed) and making the car veer right, when you lift the left tire is dragging harder and pulling the car to the left. Think of the tire as a moment arm, the left tire has a 6% greater 'arm' (by virtue of being 7/10" larger radius). Granted, the LSD should accomodate some of that, but that's really not what the LSD is for.

The right rear should be replaced immediately before any damage to the limited slip can occur.

 

That makes total sense Billy. Thanks.

BTW... I'd already made up my mind to get a new rear right. $$ but worth it.

 

Jeff

 

Dave and Mike:

You guys should be engineers. Really those answers were very insightful.

really.

No Really.

 

BTW, stupid question, but do you think it would be possible to temporarily compensate for the tread difference by slightly over-inflating the left rear tire, and slightly underinflating the right rear?

 

I do what I can for the

 

I don't think that's stupid. Especially since I'm getting rid of the tire anyway.