Uneven rear 1 year post lowered
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 784
Likes: 0
From: Edmond OK.
Uneven rear 1 year post lowered
It has been at least a year (lowered on stock bolts) and the rear measurements are: R="27'' 1/2 and L=28'' 3/4. I looked at both bolts and they are only showing 2 threads. What do I need to do next?
Melting Slicks
Joined: Sep 2005
Posts: 2,521
Likes: 146
From: Watertown CT
How's it going, I am pretty new to the corvette world and I hope you can explain to me what "lowered on the stock bolts" means. I have seen this phrase used many times but not quite sure how you lower a car on "stock bolts". The only way I ever knew was by changing out the springs or changing over to a coil over suspension. Thanks for the help, Dan
Le Mans Master
Joined: Sep 1999
Posts: 7,393
Likes: 7
From: Los Angeles CA
Originally Posted by SpeedyD
How's it going, I am pretty new to the corvette world and I hope you can explain to me what "lowered on the stock bolts" means. I have seen this phrase used many times but not quite sure how you lower a car on "stock bolts". The only way I ever knew was by changing out the springs or changing over to a coil over suspension. Thanks for the help, Dan
Melting Slicks
Joined: Sep 2005
Posts: 2,521
Likes: 146
From: Watertown CT
So you're saying without any mods to the suspension I will be able to lower my Vette? I'm sure I would need a new 4 wheel alignment, correct? How much can it be lowered on stock bolts? Thanks again, Dan
Team Owner
Joined: Mar 2002
Posts: 47,647
Likes: 1
From: Queens, New York Life begins at 183 mph....
St. Jude Donor '08-'09
Originally Posted by SpeedyD
So you're saying without any mods to the suspension I will be able to lower my Vette? I'm sure I would need a new 4 wheel alignment, correct? How much can it be lowered on stock bolts? Thanks again, Dan
You can lower it about 1 inch on stock bolts alone, you will need a 4 wheel alignment which I don't know if the original poster did. You have to wait about 300-500 miles before doing the alignment though since the car takes some time to settle.
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Originally Posted by GMvert
It has been at least a year (lowered on stock bolts) and the rear measurements are: R="27'' 1/2 and L=28'' 3/4. I looked at both bolts and they are only showing 2 threads. What do I need to do next?
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Melting Slicks
Joined: Jun 2005
Posts: 3,088
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From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
GMvert,your better off getting longer bolts so you can adjust each side so they match.http://www.tinypic.com/view/?pic=dw9wed
Melting Slicks
Joined: Nov 2000
Posts: 2,333
Likes: 32
From: USA
Originally Posted by GMvert
It has been at least a year (lowered on stock bolts) and the rear measurements are: R="27'' 1/2 and L=28'' 3/4. I looked at both bolts and they are only showing 2 threads. What do I need to do next?
Something does not sound right. No offense, but are you sure the left measurement is 28 3/4"? The right side height sounds about right.
Do you have the stock heights and the heights after you lowered the car? That would help sort this out.
Drifting
Joined: Oct 2004
Posts: 1,345
Likes: 3
From: Mesa Arizona
Ok Guys. These are adjustment bolts. You use them to lower the car as well as LEVEL the car!
If your adjustments are as low as they can go, the only thing you can do with them now is raise one or both.
If one side is lower than the other AFTER the bolts are adjusted as low as they can go, you have to adjust the low side of the car up. Adjust that bolt until the car sits level.
Don't forget that when you raise or lower one corner of the car at the rear, that also affects the front of the car also. You have to make the appropriate adjustments on the opposite end too.
It takes a little time!
Bob
If your adjustments are as low as they can go, the only thing you can do with them now is raise one or both.
If one side is lower than the other AFTER the bolts are adjusted as low as they can go, you have to adjust the low side of the car up. Adjust that bolt until the car sits level.
Don't forget that when you raise or lower one corner of the car at the rear, that also affects the front of the car also. You have to make the appropriate adjustments on the opposite end too.
It takes a little time!
Bob
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Originally Posted by bcseitz
Ok Guys. These are adjustment bolts. You use them to lower the car as well as LEVEL the car!
If your adjustments are as low as they can go, the only thing you can do with them now is raise one or both.
If one side is lower than the other AFTER the bolts are adjusted as low as they can go, you have to adjust the low side of the car up. Adjust that bolt until the car sits level.
Don't forget that when you raise or lower one corner of the car at the rear, that also affects the front of the car also. You have to make the appropriate adjustments on the opposite end too.
It takes a little time!
Bob
If your adjustments are as low as they can go, the only thing you can do with them now is raise one or both.
If one side is lower than the other AFTER the bolts are adjusted as low as they can go, you have to adjust the low side of the car up. Adjust that bolt until the car sits level.
Don't forget that when you raise or lower one corner of the car at the rear, that also affects the front of the car also. You have to make the appropriate adjustments on the opposite end too.
It takes a little time!
Bob
Drifting
Joined: Oct 2004
Posts: 1,345
Likes: 3
From: Mesa Arizona
Originally Posted by mvvette97
I raised the one side back up some. It did level it out some. I just don't know why there would be a differance when the bolts are the same size. Live and learn I guess
My car was also higher on the LR than the RR. It was also a bit lower on the LF than the RF. Took a bit of tweeking but it sits level now.
I would imagine that you would have to go through a whole pile of springs to find a perfect pair that have the proper arc and tension each side of center.
Perhaps the more expensive springs designed for the track have been tested for just that.
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Originally Posted by bcseitz
It's not the bolts, they are the same length. It's the spring and also the difference in the weight it has to carry on each of the four corners of the car not to mention if it's perfectly centered in it's perch. The longer side would (should) be the weaker side.
My car was also higher on the LR than the RR. It was also a bit lower on the LF than the RF. Took a bit of tweeking but it sits level now.
I would imagine that you would have to go through a whole pile of springs to find a perfect pair that have the proper arc and tension each side of center. Perhaps the more expensive springs designed for the track have been tested for just that.
My car was also higher on the LR than the RR. It was also a bit lower on the LF than the RF. Took a bit of tweeking but it sits level now.
I would imagine that you would have to go through a whole pile of springs to find a perfect pair that have the proper arc and tension each side of center.
Perhaps the more expensive springs designed for the track have been tested for just that.
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 784
Likes: 0
From: Edmond OK.
Thanks for the replies. It does not matter any more because I am going to further lower with longer bolts in the back, trim the front, and put Bilstein shocks on a soon as I recover from shoulder surgery. Also I have rocker rail savers on order with frame savers already on. I am just getting started on this baby.
Race Director
Joined: Jul 2005
Posts: 11,308
Likes: 1
From: The Beautiful Greater Bay Area California
Originally Posted by GMvert
Thanks for the replies. It does not matter any more because I am going to further lower with longer bolts in the back, trim the front, and put Bilstein shocks on a soon as I recover from shoulder surgery. Also I have rocker rail savers on order with frame savers already on. I am just getting started on this baby.
Get well soon with that shoulder. Basically, your plan above sounds good (longer bolts, bilsteins, and, alignment, etc.). You are on the right track, good buddy. Do let us know how it all turns out for you. Best wishes.
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Got mine aligned the other day. After I cut the front bushings and got longer bolts for the rear it sets level. In case any of you read my thread the other day about the dealer breaking my rocker panel well they fixed it as good as new. The alignment made it drive alot better also.
Pro
Joined: Jul 2002
Posts: 595
Likes: 90
From: Lisbon WI
Have you measured to the frame rails? Although this is a lot of difference, the real measurement should be the same location on the frame on either side of the car.
There is too much tolerance stack measuring at the top of the wheel well to tell if the issue is actually a suspension issue or a body panel issue.
There is too much tolerance stack measuring at the top of the wheel well to tell if the issue is actually a suspension issue or a body panel issue.