New RunFlats, New Problem?
Thread Starter
Instructor
Joined: Jul 2001
Posts: 123
Likes: 0
From: Columbia SC
New RunFlats, New Problem?
Ever since I had two new rear GY Runflats installed on my 98 C5 at the local GY dealer in Lexington, SC, driving it on both the highway and street at normal speeds, I noticed that the rearend is very loose while changing lanes. I noticed that when I turn the wheel slightly that the car is "swaying" into the turn and not "on rails" as it was before the tires were installed. In fact, it feels like something is very loose in the rear of the car. I will take it somewhere, but good advice and help is good to find. I don't trust the dealerships prognosis most of the time. I am running 30PSI all around on my stock coupe and the front GY runflats were replaced just last year w/ @ 5-6 K on them. :confused:
Advanced
Joined: Aug 2001
Posts: 93
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From: Dublin Ca.
Re: New RunFlats, New Problem? (Flitter1)
This happened to a friend of mine, he found out that they left the sway bar (I think that is what it was) loose, It is NOT the tires I would bet, before you drive it any further check it yourself or take it somewhere (carefully on tow truck even) It might be something like that, I wish I could recall what it was, But he almost lost it and then he thought it was the Active Handling and bought front tires thinking it was only two new tires, it was not that prob, Something in the suspension is loose Or they bent something jacking the car up? Check it out and give a report back on your findings
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Re: New RunFlats, New Problem? (Flitter1)
Just another thought... I has happened here to a few... check the direction, make sure they were mounted correctly.. EMT's are directional..some times the obvious is overlooked..
Bill ( Evil-Twin )
Bill ( Evil-Twin )
Thread Starter
Instructor
Joined: Jul 2001
Posts: 123
Likes: 0
From: Columbia SC
Re: New RunFlats, New Problem? (WEF's 95)
Talked to the GY dealer today and found out that they did not use a rack system to lift the car. They used a jack!!!!! So who knows if they screwed something up. I am going tomorrow 9/8 to find a solution to this problem. i will post the fix as soon as completed.
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Burning Brakes
Joined: Apr 1999
Posts: 947
Likes: 1
From: Lake Worth. Fl.,USA Fl
Re: New RunFlats, New Problem? (Flitter1)
The tread design (rotational) should not affect handling to the extent you mentioned. The tread grooves are for channeling the water away,and has no effect on dry pavement.
Racer
Joined: May 2001
Posts: 253
Likes: 3
From: The Woodlands Texas
Re: New RunFlats, New Problem? (Flitter1)
I have been through about 6 sets of GY EMT's on my C5's and I get this every time I put a new set on. You get a lot of compliance from the thicker tread blocks on the new tires. The car feels like it floats. There is a curve I go around on the way home every day that I normally take at 70 MPH with cruise control on. After I get new tires the best I can do is 62 and that brings on the active handling. This is the reason that racing tires are shaved.
Safety Car
Joined: Dec 2000
Posts: 4,798
Likes: 2
From: Norman Oklahoma
Cruise-In III Veteran
St. Jude Contributor
Re: New RunFlats, New Problem? (AllVette)
Mine had the same feeling when one of my rear shocks had gone bad, the car felt as if it was going to come around at times and was worse when hitting dips in the road.
You can unbolt them at the top by removing the two 13mm bolts and see if they are still firm or just fall down.
In my case it was the right rear, it's as good as new since the shock was replaced.
Good luck !
:cheers:
You can unbolt them at the top by removing the two 13mm bolts and see if they are still firm or just fall down.
In my case it was the right rear, it's as good as new since the shock was replaced.
Good luck !
:cheers:
Pro
Joined: Mar 2001
Posts: 711
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From: Orlando, Florida
Re: New RunFlats, New Problem? (Flitter1)
If all they did was put the tires on... they shouldn't have touched the sway bars, shocks, etc. I'd check imediately for anything loose & get back to them ASAP for a double check/fix.
Race Director
Joined: Mar 2001
Posts: 19,965
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From: Bonneville Salt Flats
Re: New RunFlats, New Problem? (wwashing)
JCR, Yes incorrectly installed unidirections DO make that much difference. A friend's WIFE just picked up his Vette with new tires installed at GY dealer, drove 1 block, freaked, and turned around and went back. Two tires had been mounted backwards. Duh!!! She said it was unbelievably squirrelly!
Thread Starter
Instructor
Joined: Jul 2001
Posts: 123
Likes: 0
From: Columbia SC
Re: New RunFlats, New Problem? (Avanti)
Tire problem fixed. It was the torque of the lug nuts! They remounted them correctly and fixed my swaying. Thank god it wasn't anything else, just a little tightening.
