Composite Rear Spring
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Joined: Mar 2007
Posts: 79
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From: Burbank CA
Composite Rear Spring
TRW Corvette Composite rear leaf spring has just been installed.. and right away it's raised the old lady's rear end up about two inches!! I used a 340lb rated spring and so far it seems to be doing a good job.
One point to note was that the bolts holding the original spring (which this week decided spring had sprung and it turned itself into sheet steel) were jammed on entirely on the passenger side... meaning they had to be cut off!
Next job is to swap out the shocks... those nice people at the parts store gave me a box that has rear springs written on it and fronr springs inside... not to worry. We can't all be normal...
Looking forward to seeing how the spring changes things relative to the rear end vibration... and then how the shocks alter it as well.
One point to note was that the bolts holding the original spring (which this week decided spring had sprung and it turned itself into sheet steel) were jammed on entirely on the passenger side... meaning they had to be cut off!
Next job is to swap out the shocks... those nice people at the parts store gave me a box that has rear springs written on it and fronr springs inside... not to worry. We can't all be normal...
Looking forward to seeing how the spring changes things relative to the rear end vibration... and then how the shocks alter it as well.
Melting Slicks
Joined: Jun 2003
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From: Niles, MI
Drifting
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From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
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St. Jude Donor '07
You may want to change your spring bolts for some longer ones. Not sure about the 75 but my 69 used 9/16 in dia. bolts. Find a local Cat diesel parts supplier and you can buy new 8 or 10 inch long bolts for less than $4 ea. I am using 8 in. long bolts with a TRW mono and they work out good for my car.
Le Mans Master
Joined: Jan 2006
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From: Butler Pa
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Joined: Mar 2007
Posts: 79
Likes: 0
From: Burbank CA
no. the new spring is wonderful. the old one, and original to the car from '75 had turned itself into a flat piece of steel recently. the car has been sat for a while and since i bought it it gets driven every day.
I noticed last night from the reciepts I have from work over the last ten years or so that the front suspension was rebuilt but no shocks were listed... also the rear suspension has no listing on any reciept.
Makes me wonder what the last guy did - he spent lots on rebuilding the engine and brakes but not so much on the suspension or rear end as far as i can tell. I'm beginning to get a picture of what needs to be done to make this a nice car...
I noticed last night from the reciepts I have from work over the last ten years or so that the front suspension was rebuilt but no shocks were listed... also the rear suspension has no listing on any reciept.
Makes me wonder what the last guy did - he spent lots on rebuilding the engine and brakes but not so much on the suspension or rear end as far as i can tell. I'm beginning to get a picture of what needs to be done to make this a nice car...
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