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10/22/11 7:07pm - Original Message: 'Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
OK in an effort to get a jump on my rear spring project, tonight I went down and put the Rook-mobile up on jackstands and crawled under to have a peek.
 
So as I understood (or not) the bolts that attach to the rear springs through the trailing arm are to be about 8 inches stock......
 
Mine measure just over 6 1/2 long with about a half inch of thread below the castle nut.
 
So my question is why the heck is my rear end so low (another one for your book Marshall)?
 
I thought shorter bolts meant higher rear stance......My front wheel wells measure 29" center at the higest  point, and the rears are 27" .........
 
Input please...............
 
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10/22/11 9:02pm - Reply: 'Re: Rear suspesnion...a little clarity please'
Jaws79 Lifetime Member
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Sykesville, MD - USA

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1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

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If your current springs are sagging, that could be a big part of the problem.
 
Barry
 
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10/23/11 11:12am - Reply: 'Re: Rear suspesnion...a little clarity please'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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Ya'll write this date down in yer books....it may never happen again, 'cause Imma gonna agree wid BlueBarry!! Shocked
LOL
The rear spring may indeed be saggin a little, as we all do with age. Longer spring bolts give you more adjustment for raising/lowering the rear ride height. Stock, factory style bolts have a shoulder on them that will not allow much adjustment. Aftermarket, longer bolts will allow adjusting the height up/down some.If you have the original bolts, and the rear sits too low, your spring itself is likely sagging. Using a shorter bolt, or one that allows more adjustment will only cover up the problem, but not correct it.
btw...the cars usually have a little reverse "wedge" to begin with...the front sits a little higher than the rear, even when new.

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Joel Adams
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10/23/11 12:12pm - Reply: 'Re: Rear suspesnion...a little clarity please'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
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Yep, more than likely time for some new rebounding energy in the back end. Composite monoleaf is the way to go!! Thumbs Up

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10/23/11 1:53pm - Reply: 'Re: Rear suspesnion...a little clarity please'
Jaws79 Lifetime Member
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Sykesville, MD - USA

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1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

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Hey, Joel, I can be right every once in a while! (write it down, though, it doesn't happen often).
 
Barry
 
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10/23/11 10:25pm - Reply: 'Re: Rear suspesnion...a little clarity please'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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LOL Handshake

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Joel Adams
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10/24/11 11:43am - Reply: 'Re: Rear suspesnion...a little clarity please'
aceinthehole Lifetime Member
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Valley Springs, CA - USA

Vette(s):
1978,Metalic Money Green W/Gold emblems,TH350 w/gear splitter,black & grey interior.1978,two tone,Metalic Rootbeer & gold ,Doeskin interior,auto. trans. 1981, Silver w/mirrored T-Tops,4 spd, charcoal interior.

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The Rook said: OK in an effort to get a jump on my rear spring project, tonight I went down and put the Rook-mobile up on jackstands and crawled under to have a peek.
 
So as I understood (or not) the bolts that attach to the rear springs through the trailing arm are to be about 8 inches stock......
 
Mine measure just over 6 1/2 long with about a half inch of thread below the castle nut.
 
So my question is why the heck is my rear end so low (another one for your book Marshall)?
 
I thought shorter bolts meant higher rear stance......My front wheel wells measure 29" center at the higest  point, and the rears are 27" .........
 
Input please...............
 

Actually on all the rear springs I've changed out, the stock springs were 6 1/2" in length and the aftermarket bolts were 8", supposedly allowing you a little adjustment. Like Joel Says , your sittin low in the back. My cars average 27-28" in front and 29-30" in the rear. Sounds like time to change springs.

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10/24/11 2:53pm - Reply: 'Re: Rear suspesnion...a little clarity please'
corvette440hp Lifetime Member
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Dan, A pertinent question I need to ask: Did ebo ride in your car before the suspension started sagging?................or what?Wink

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10/24/11 6:04pm - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

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1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
corvette440hp said: Dan, A pertinent question I need to ask: Did ebo ride in your car before the suspension started sagging?................or what?Wink



He did indeed ride in it, but the sag was already there.........

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10/24/11 6:33pm - Reply: 'Re: Rear suspesnion...a little clarity please'
corvette440hp Lifetime Member
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The Rook said:
corvette440hp said: Dan, A pertinent question I need to ask: Did ebo ride in your car before the suspension started sagging?................or what?Wink



He did indeed ride in it, but the sag was already there.........


Darn...............I kind-a thought ebo had something to do with it? Maybe it's sagging more post ebo than pre ebo. And you would let ebo ride in it.............That's like bad karma.........Wink You, really never know..............could have been even good karma..........(now I'm confusing myself.........I can easily do that to myself.............)

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11/2/11 2:59pm - Reply: 'Re: Rear suspesnion...UPDATES AND QUESTIONS'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600

Update and Questions

As the Rookmobile sits on jack stands, today I removed a heat shield and started soaking the center spring bolts in preparation of the new spring.
 
So, was this heat shield a standard option or was this installed aftermarket? 
 
More importantly why are there 4 washers on the foward bolts and only 1 on the rears?
 
And lastly I saw a HE(maybe HF)-385 printed on the leaf spring, whats does this mean? And it is indeed the original 9 leaf stock spring?
 
Also Ive decided on the 330# composite spring from VBandP.....best deal I found.


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11/2/11 4:35pm - Reply: 'Re: Rear suspesnion...a little clarity please'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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afaik, the only ones that had the heat shield from the factory were the ones with the composite springs. It sounds like your spring has been replaced somewhere down the line, from the description. There should be no extra washers on the 4 bolts on the center mount. What color is your spring? If it is anything other than a primer grey looking color, it has either been painted, or it is an aftermarket replacement....imo.

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Joel Adams
C3VR Lifetime Member #56    
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11/3/11 7:15am - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
The spring isnt primer grey....more black than anything and the letters are white. i'll try to post a pic of it tonight....
The heat shield appers to be aluminum, it had about 1/8 of grease and gunk on it. have it soaking in simple green. It has all the holes and even a retainer clip that attached to the bracket at the spring, Ill post that as well....

|UPDATED|11/3/2011 4:15:55 AM (AZT)|/UPDATED|


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11/2/11 8:03pm - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
Top left is the heat sheild...Right is spring retainer and bottom is the spring.


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11/2/11 10:34pm - Reply: 'Re: Rear suspesnion...a little clarity please'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
Definitely NOT a factory rear spring. Original springs will NOT have the bands around them to lock the leaves together.
Looks like there may be fewer leaves in the stack than original, too. The center bolt that holds the leaves together should not be sticking thru the bottom that far....should only be aboot 3/8" of thread showing on that bolt. There ealso does not appear to be any plastic/poly liners between the individual leaves, which would help keep them from rubbing together, and making the ride harsher than it should be.

Can't see the shield....Here's a hint/tip...RESIZE the pics smaller before uploading them....LOL Those lifesized pics are murder!LOL

As far as the washer deal, I think that goes back tot he spring being a smaller stack than original, so someone improvised. Either that, or they lost the bolts, and this is all they had to replace them. I'd look very carefully at the diff housing where those bolts go....the housing can be cracked easily if the wrong bolts are forced into the threaded holes.
hth


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Joel Adams
C3VR Lifetime Member #56    
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11/3/11 7:16am - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
I knew something wasnt quite right, explains why the car rides like a solid axle lumber wagon.
So then is that why she sits lower in the rear?


|UPDATED|11/3/2011 4:16:15 AM (AZT)|/UPDATED|


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11/3/11 8:11am - Reply: 'Re: Rear suspesnion...a little clarity please'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
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It's soitainly possible. Standard suspensions used a 9 leaf stack, while the F41/HD suspensions used a 7 leaf stack. What you have may be a replacement spring that is just too firm, or mis-represented from the vendor...that happens a lot. I haven't been able to reference any springs with the numbers that are on yours, so I ain't sure who made/sells it.
Yer replacing it anyway, so it's kinda a moot point, eh? You'll like the composite spring mooch mo betta. Thumbs Up


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Joel Adams
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11/5/11 3:06pm - Reply: 'Re: Rear suspesnion...a little clarity please'
sfindlan
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Badin Lake, NC - USA

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1979 Red L-48 Corvette with Doeskin interior, 3-speed automatic, 3.55 rear; 1986 L-98 Coupe, 4+3 Manual - Satin Black and Purple (SCCA TT/Hillclimb Car); 1993 White LT-1 Coupe, Black Interior, 6-speed

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As an FYI, my 79 has the heat shield with the standard steel leaf spring. It has not been replaced.

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C3: 1979 Corvette Coupe, Auto, L-48, Red/Doeskin (my wife's fave);
C4s: 1986 C4 coupe (SCCA road race car), satin black, 4+3, Z51 package, L-98;  & 1993 C4 coupe, white, 6-speed, LT-1.
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11/5/11 3:45pm - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

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1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
sfindlan said: As an FYI, my 79 has the heat shield with the standard steel leaf spring. It has not been replaced.



Could you snap me a pic or confirm your heat shield looks like the one in my picture above.


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11/13/11 10:13am - Reply: 'Re: Rear suspesnion...a little clarity please'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
Ok the spring is finally out and the composite spring is here.
Im still struggling with the shock sitaution.
 
I have time to ponder as I decided to do a little clean up and maybe some painting (frame and trailing arms)since I have the rear wheels and springs off.
 
Is there anything else I should consider doing back here?
 


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