1977 
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Rear Suspension fix for sagging leaf spring - temporary ofcourse (Read 5861 times)
Nov 3rd, 2010 at 1:16pm

TX 73 gone   Offline
Top Gun Member
My Vette went to a good
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Sugar Land, TX

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Posts: 2155
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My 73 had air shocks on it when I got it which had to have been 10 years old. They would hold air and sit right at 1st but eventually gave out. I bought some standard gas shocks and replaced the 2ea 6in bolts with shorter 3 1/2 in bolts and now the car sits right and rides much smoother. Not sure how old the leafspring is but for now, this was an inexpensive fix to the sagging rear end. Just be sure to get the 5/8" fine pitch grade 8 bolts. let me know if you have questions or comments.
 

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Reply #1 - Nov 4th, 2010 at 9:38am

Artsvettes   Offline
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New Jersey

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Posts: 3158
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Wow something is not right.  The stock bolt is 9/16-18 X 6 3/8 long and that is tough getting in. I can't imagine a 3 1/2 in bolt and giving correct ride height. Don't forget the cotter pin in that bolt. I had nyloc's come loose on 8 inch bolts  it was not fun. K--Boom. I switch back to the stock bolts...............jack
 

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Reply #2 - Nov 4th, 2010 at 9:53am

TX 73 gone   Offline
Top Gun Member
My Vette went to a good
home!
Sugar Land, TX

Gender: male
Posts: 2155
*****
 
Yep, I was trying to figure out an easy way to raise it and since the leaf springs sit on those 6" long bolts, I figured shoter ones would raise it. I'm not sure the exact diameter but I got the exact same ones it had. Thought about going 1 size up but it would have been tight.  Anyway, you have about an inch of threads to play with. All the way up was too stiff so I backed them down to the bottom. I bought new cotter pins but haven't drilled the bolt as I was waiting to see where I wanted them. They didn't have a castle or nylon lock nut so I just used a standard lock washer. Been about 2 weeks and they haven't moved yet. I love this forum and will add some photo's real soon.
 

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Reply #3 - Feb 21st, 2011 at 10:20pm
POPA   Ex Member

 
MY 72 had the same problem. I cut (2, one for each side) 2 in high pieces of solid pipe that was same dia of the bushings. Then I drilled a hole through the center. I put this on the bottom of the spring. This has the same effect of shorting the bolt 2 in but I keep the original hardware. Solved the problem for now.
 
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