C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Leaf Spring Splintering

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Old Jun 9, 2015 | 11:08 PM
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Default Leaf Spring Splintering

I'm in the process of installing poly bushings currently and have the rear end dropped and disassembled. While inspecting parts I've noticed that I have some small splintering on the concave side of the spring. This car was used and abused before it met me, and I haven't been the nicest either. This is an 85 non-Z51 car.

Pictures http://imgur.com/a/GpCkb

I have no idea how long I've driven on this. What are some options for fixing this? Duct tape should do it, yes? Or is replacement a good thought?
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Old Jun 10, 2015 | 02:57 AM
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I had the same issue on my 86 and replaced it.
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Old Jun 10, 2015 | 04:26 AM
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My 95 has splintering also. I have had this for a few years. I don't drive it that much but keep checking it. Eventually I'll probably replace it.
Duct tape won't cure it.
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Old Jun 10, 2015 | 05:53 AM
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bottom line - replacement.
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Old Jun 10, 2015 | 06:58 AM
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use at least 2 rolls of the silver duct tape, roll it real tight, around and around, then list it on craigslist as a special racing spring !
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Old Jun 10, 2015 | 07:38 AM
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I would not put it back in!!!!!!
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Old Jun 10, 2015 | 08:53 AM
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then list it on craigslist as a special racing spring
Lost it, haha, I appreciate the input everyone. I'll be hunting for replacements then, fortunately it isn't to much to install/swap one.

Is there any difference between the spring rates of a D36 rear car and a D44? Or is it only between the Z51 and non-Z51?
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Old Jun 10, 2015 | 09:03 AM
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Originally Posted by tgurnick
Lost it, haha, I appreciate the input everyone. I'll be hunting for replacements then, fortunately it isn't to much to install/swap one.

Is there any difference between the spring rates of a D36 rear car and a D44? Or is it only between the Z51 and non-Z51?
The rear spring will fit all C4's and through the years there were multiple springs offered for various combinations. Never would the D36 or D44 make a difference and likely after '84 most every Z51 optioned car likely had the D44 rear. I'm sure there's an exception or three but MOST I believe would be D44/Z51 combinations.

Contact user "indianavette" - Ralph might be very close to you and be able to help for cheap.

Ralph is maybe 90 minutes away.

I have a VBP new rear that's quite soft (they referenced it as SPORT) and I have a NYR coded rear that was on a shelf for years as a possible spare for a hot-rod, never installed.

Last edited by WVZR-1; Jun 10, 2015 at 09:16 AM.
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Old Jun 10, 2015 | 09:07 AM
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Found some on ebay $80 to $150
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Old Jun 10, 2015 | 10:00 AM
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VBP makes excellent springs.
I bought the Sport Spring, which is stiffer even than the Z51 spring...and yet my car rides better than it ever did otherwise. Modern composites are light years ahead of what we had on our cars in the 80s.

I wouldn't even waste my time with an old factory spring.
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Old Jun 10, 2015 | 10:26 AM
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Elmers wood glue
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Old Jun 10, 2015 | 10:51 AM
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Originally Posted by MavsAK
VBP makes excellent springs.
I bought the Sport Spring, which is stiffer even than the Z51 spring...and yet my car rides better than it ever did otherwise. Modern composites are light years ahead of what we had on our cars in the 80s.

I wouldn't even waste my time with an old factory spring.
my original spring looked like an angry porcupine.

call VBP; they can literally cook up any spring rate from boulevard cruiser to jar the fillings in your teeth loose, and they mount up simpler than the stock OEM setup; also, grab a couple of their extra long bolts to allow additional height adjustment / lowering at the rear of the car.
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Old Jun 10, 2015 | 12:22 PM
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What about elmers wood glue AND duct tape?

For reals though, VBP sounds like a good place to look, and they clearly have a good reputation. I will also reach out to indianavette and see what they may or may not have.

Due to budget it will likely get put back on for a little while. I don't race it yet, and I've been driving on it for who knows how long as is. We'll have to see.

I almost don't want to buy anything unless it's going to be new. Replacing a 30 yr old part with a different 30 yr old part in this instance doesn't make the best sense to me unless it was NOS and never installed.

I'm glad there weren't any stories of "oh man, mine did that and then snapped and it was blah blah blah". It appears not good, but not immediately catastrophic.
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Old Jun 11, 2015 | 12:33 AM
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Originally Posted by WVZR-1
likely after '84 most every Z51 optioned car likely had the D44 rear. I'm sure there's an exception or three but MOST I believe would be D44/Z51 combinations.
My '86 Z51 has a D36 rear.

It's my understanding that the difference is that the automatics have D36 and the manual trans cars have D44.
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Old Jun 11, 2015 | 05:11 AM
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Originally Posted by Cliff Harris
My '86 Z51 has a D36 rear.

It's my understanding that the difference is that the automatics have D36 and the manual trans cars have D44.
I would have thought that I might have/should have known that - I don't know that I've claimed many "senior moments" but I believe I'll do that in this instance.

REGARDLESS - any year C4 rear spring will work and I don't believe I'd avoid a used unless it was for some sort of "specific" usage.

Last edited by WVZR-1; Jun 11, 2015 at 06:13 AM.
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Old Jun 11, 2015 | 11:16 AM
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I have a stock 92 spring in excellent shape if your interested It's a NYR. I'd do $65 plus shipping.

Last edited by kimmer; Jun 11, 2015 at 11:38 AM.
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Old Jun 11, 2015 | 03:32 PM
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Originally Posted by tgurnick
I'm in the process of installing poly bushings currently and have the rear end dropped and disassembled. While inspecting parts I've noticed that I have some small splintering on the concave side of the spring. This car was used and abused before it met me, and I haven't been the nicest either. This is an 85 non-Z51 car.

Pictures http://imgur.com/a/GpCkb

I have no idea how long I've driven on this. What are some options for fixing this? Duct tape should do it, yes? Or is replacement a good thought?
Hey there, Lafayette, C4 engineers used to say you can't wear out a fiberglass spring but if it starts to splinter, change it asap. My charts show a code NYR as the base '85 rear with the NYU specific to the Z51 suspension. I'm pretty sure I have both. These are take-offs or like-new spares from a Tommy Morrison mobil 1 racing program in the late '80s. Asking $150 for the NYU, $100 for the NYR. I'm in Shelbyville.
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Old Jun 11, 2015 | 06:50 PM
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Hey indianavette your pretty rude, this isn't ebay, at least take yours to a pm!
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Old Jun 11, 2015 | 07:17 PM
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Originally Posted by kimmer
Hey indianavette your pretty rude, this isn't ebay, at least take yours to a pm!
Ouch. Did not intend to offend. Plz disregard the last sentence.
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Old Jun 11, 2015 | 07:53 PM
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WOW - back in post#8 I suggested that the OP contact Ralph because it appeared they could be very close to one another and Ralph seems to use people right. They're not but 90 miles or so apart. I thought the "local" might work.
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