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My '73 appears "jacked up" in the rear at its stock ride height. I'm planning to rebuild the rear suspension and wonder if these bolts might drop it just a bit.
Link doesn't work for me but 8" bolts will lower it. Half shafts should be slightly lower at outboard ends then inner ends. You can google C3 rear suspension D height
Running a 8" bolt is semi-common especially for some of the glass leaf springs (the "TRW" one comes with them) Typically they are fine as long as the bolt doesn't hang down lower than the rim on the car. A 15" rim can take a 8" bolt but just.
As stated above, see if the 1/2 shafts are more or less level, slightly higher at the diff is where it was meant to be. Lower does tend to look better by todays standards though...
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I have a TRW 330 lb rear spring on my 1978. I am not happy with the ride height even with 8” bolts. I do have factory 15” wheels. Has anyone tried or had any luck with the part I have attached? I thought this was relevant to the original post. I’m not trying to hijack. I am either ordering a new Van Steele low arc or if someone has used these and had luck. They cost is about the same. Thanks guys.
I have a TRW 330 lb rear spring on my 1978. I am not happy with the ride height even with 8” bolts. I do have factory 15” wheels. Has anyone tried or had any luck with the part I have attached? I thought this was relevant to the original post. I’m not trying to hijack. I am either ordering a new Van Steele low arc or if someone has used these and had luck. They cost is about the same. Thanks guys.
That’s just a really, really expensive version of the bolt with bushing combo that is original (or longer, to lower nominal ride height).
I don’t see where this overpriced set up does anything the bolt can’t do. Actually, it looks like it might give less adjustment than the bolt.
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from his link
63-82 Rear Spring Bolts With Nuts - 8" Bolt For Adjusting Ride Height - Pair
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For 84-up use part # 584215 or 584105 with bushing. Stock length 6 3/4" overall. Bolt length 7 7/8", threads 9/16 x 18
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This chart is quite helpful. According to these measurements, my car is about 2" too high. And I'm using stock suspension, wheel & tires sizes. Surprising! Definitely going to try those 8" bolts.
This chart is quite helpful. According to these measurements, my car is about 2" too high. And I'm using stock suspension, wheel & tires sizes. Surprising! Definitely going to try those 8" bolts.
You have a 9 leaf steel spring?
Can you post a picture of the outer spring bolts?
Are the bolts 6" long?
On my 1968 C3 I was getting noise from the Posi-unit so I priced around and finally chose a dealership who could do the re-build. They replaced most of the old hardware with new Nuts and bolts due to their age. I was happy to get my Corvette back and didn't pay attention to the angle of the rear so I drove it for a while hoping that the rear would drop back to it's original position. After 500 plus miles the rear was still high enough that you could see the spoiler in the rear view Mirror and I knew there was a problem. I spent several hundred Dollars trying to get the problem solved for me and nothing worked.
At a Corvettes@Carlisle I spoke to a man from Vette Brakes and Products and the gentleman started chuckling. He walked over and sold me a set of longer 8" bolts with lock nuts. It turned out the mechanic put a 6" bolt in place of the original 8" and this really messed up the rear geometry. I went home and installed the new longer bolts and the rear end went back to it's normal position. My expense for the FIX came out to staggering Sub $20 and I did the work myself.
On my 1968 C3 I was getting noise from the Posi-unit so I priced around and finally chose a dealership who could do the re-build. They replaced most of the old hardware with new Nuts and bolts due to their age. I was happy to get my Corvette back and didn't pay attention to the angle of the rear so I drove it for a while hoping that the rear would drop back to it's original position. After 500 plus miles the rear was still high enough that you could see the spoiler in the rear view Mirror and I knew there was a problem. I spent several hundred Dollars trying to get the problem solved for me and nothing worked.
At a Corvettes@Carlisle I spoke to a man from Vette Brakes and Products and the gentleman started chuckling. He walked over and sold me a set of longer 8" bolts with lock nuts. It turned out the mechanic put a 6" bolt in place of the original 8" and this really messed up the rear geometry. I went home and installed the new longer bolts and the rear end went back to it's normal position. My expense for the FIX came out to staggering Sub $20 and I did the work myself.
Original factory bolt was 6". Only if spring was replaced would you need 8".
not sure if that's solving a problem or creating a new one.
Rear end ride height
