Rear Axle Spring Perch - U-Bolt Holes - Team Camaro Tech
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post #1 of 5 (permalink) Old Jul 1st, 03, 06:53 AM Thread Starter
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Join Date: May 2001
Location: Phoenix
Posts: 88

I had new perches welded on the rear end housing (12-Bolt to convert to multi-leaf springs), and the holes for the U-Bolts are slightly narrower that the factory shock plate mounts. Is it okay to elongate the perch holes, or will this cause other problems? Thanks.


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post #2 of 5 (permalink) Old Jul 1st, 03, 07:05 AM
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Join Date: Jan 2000
Location: Houston, TX USA
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It would seem easier to me to slightly bend the ends of the U-Bolt in to meet the holes in the plate.. I would rather see you do it that way, then try elongating the holes in the shock plate..

Maybe that is the problem that you have now, the U-Bolts are bent out slightly not allowing them to pass through the holes in the plate..

That would be my suggestion.. Bend the bolts to work with the plate..

The only other thing I would mention is this-if you are going from a single leaf spring, to multi leaf springs, you should know that the original shock plate for the single leaf spring had one U-bolt, and 2 T-bolts for each mount.. When you remove those 2 T-Bolts you will have to drill those holes out larger in order for a U-Bolt to pass thru as the U-bolt is larger in diameter than the T-bolts... Is that possibly your problem?

Wait, I just went back and re-read your post, are you saying that when you put the shock mount plate up against the spring perch that the holes do not line up???? If that is the case, yes, you will need to elongate the holes in either the perch, or the shock plate, or a little from both, to get the U-Bolts to pass thru..

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post #3 of 5 (permalink) Old Jul 1st, 03, 08:13 AM
Join Date: Sep 2002
Location: N.C.
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I have the one u-bolt and 2 T-bolts on my multi leafs. So this isnt factory? I have never thought about it until now. The car is a 69 350 SS. Did some of these come with single leafs? I am having a problem with the shocks "topping" out and it does sit a little high in the rear?? What is the difference between the single and multi leaf shock plates?
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post #4 of 5 (permalink) Old Jul 1st, 03, 10:03 AM
David Pozzi
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Buy multi leaf shock plates, they will raise the shock mounts up. You will need shock studs to bolt into the shock plates and your shocks will slip onto the studs.
Multi leaf shocks come with the stud allready on the shock.
I have some photos of this on my page below.

Check my web page for First Gen Camaro suspension info:
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post #5 of 5 (permalink) Old Jul 1st, 03, 11:06 AM Thread Starter
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Do you see any problem with elongating the holes on the multi leaf perches for the problem I described in my original post? Will it cause any issues? Thanks.


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