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Coilovers Rubbing Halfshafts

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Old Oct 17, 2013 | 11:58 PM
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Default Coilovers Rubbing Halfshafts

My coilovers are rubbing up against my half shafts. I had the top mounts modified rewelded and relocated a half inch. Any thoughts in remedying this? Opinions?

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Old Oct 18, 2013 | 01:00 AM
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In another similar install with the same issue a washer was added at the lower shock mount. I don't recall the ID now of the shock mount but I'm quite sure I have some notes with it. I believe the upper mount dimension was 5/8 vs 1/2 but I recall others that did the 1/2 and were happy with the results. I'll check with the fellow whose install it was. It was maybe a year + ago.

I have a lower shock mount I believe I can use for dimensions and post back.

*** I needed to ask if you were using the OE lower mount OR if you've purchased maybe an after-market lower mount for the shock.
Which did you use?

Last edited by WVZR-1; Oct 18, 2013 at 06:43 AM.
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Old Oct 18, 2013 | 10:30 AM
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Im using the OE lower mount.
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Old Oct 18, 2013 | 11:00 AM
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I gave mine about a half turn and the rubbing stopped, permanently. The problem is that they are just SO close that a minuscule adjustment makes a big difference.
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Old Oct 18, 2013 | 11:46 AM
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I had that issue when I first installed mine. Van Steel designed a upper mount with the right gap to clear the half-shafts.

The mount didn't exist at the time so I grinded the frame, and the machine shop did the rest.






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Old Oct 18, 2013 | 12:53 PM
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Originally Posted by BigRedPig
I gave mine about a half turn and the rubbing stopped, permanently. The problem is that they are just SO close that a minuscule adjustment makes a big difference.
That can certainly work and it would be the first try.

Here's a thread that mentions the 5/8" - 3/4" dimension for the top shock movement forward. He mentions he tried the 1/2" also.

http://forums.corvetteforum.com/1584180766-post15.html

Last edited by WVZR-1; Oct 18, 2013 at 01:12 PM.
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Old Oct 18, 2013 | 02:12 PM
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Originally Posted by WVZR-1
That can certainly work and it would be the first try.

Here's a thread that mentions the 5/8" - 3/4" dimension for the top shock movement forward. He mentions he tried the 1/2" also.

http://forums.corvetteforum.com/1584180766-post15.html
Ill have to check my receipt, It might have been 5/8 foward. Ill try muscling it together.
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Old Oct 18, 2013 | 05:30 PM
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Funny thing is that it only makes noise in reverse. I don't notice it in drive
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Old Oct 18, 2013 | 05:53 PM
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Originally Posted by fc_soldier
Funny thing is that it only makes noise in reverse. I don't notice it in drive
Wrap your half-shafts with vinyl tape in the areas where there seem to be issues and go for a ride. First maybe just a drive on good highways and check, do another drive on maybe rougher surfaces. Maybe a more spirited drive if it passes a conventional drive.

Maybe just use a spray bomb and check for issues. Might be easier.


I would think that if you have issues in just a single direction, in this case reverse you might just need to re-bush the rear suspension. The 4 knuckle links in particular. The paint or tape test should justify that.

Last edited by WVZR-1; Oct 18, 2013 at 08:04 PM.
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Old Oct 18, 2013 | 09:48 PM
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Fixed it.... I switched washer to a thinner one.

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