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2/21/16 11:49am - Original Message: 'Corvette rear height problem?'
dads2vette Lifetime Member
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Ash Fork, AZ - USA

Vette(s):
1981 Red Interior White exterior

Joined: 4/18/2007
Posts: 1043
Yes, I know my rear has a height problem, that's why I specified the Corvette. 

New rear differential installed. new half shafts, drive shaft, wheel bearings, trailing arm urethane bushings, rear spring urethane bushings and longer bolts.

Driver side is 1 inch lower than passenger. I was told that was due to a weak composite rear spring(due to my fatness). I would assume that the longer bolts could be adjusted to level the height. That being said, I have no experience with this and I love guessing about shi...stuff I know nothing about.


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Dave C..........My mantra: I can not be bought!!      Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"


Yeah, I know, Shut up Dave.
Lifetime Member #192


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2/21/16 12:05pm - Reply: 'Re: Corvette rear height problem?'
johnu
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Eagan, MN - USA

Vette(s):
1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert

Joined: 5/23/2007
Posts: 508
Yup, Rear bolt adjustment.... or opposite side front spring.
 
Interesting it did not do this before? 
 
Additional thoughts:  turn the spring around if one side is more worn....odd?  My composite spring is 24 years old.  No issues I've seen yet.
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|UPDATED|2/21/2016 9:05:56 AM (AZT)|/UPDATED|


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      Only 23 years together
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2/21/16 12:50pm - Reply: 'Re: Corvette rear height problem?'
dads2vette Lifetime Member
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Ash Fork, AZ - USA

Vette(s):
1981 Red Interior White exterior

Joined: 4/18/2007
Posts: 1043
What John, you couldn't call? 

I didn't have this pronounced of an issue. It was about an eighth off prior to rear end rebuild. Bolts are tightened to same depth.


____________________________________
Dave C..........My mantra: I can not be bought!!      Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"


Yeah, I know, Shut up Dave.
Lifetime Member #192


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2/22/16 2:21pm - Reply: 'Re: Corvette rear height problem?'
Vman73
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 384
Wow, you've gotten a lot of work done to the Vette since moving to AZ. Must be liking that warmer weather. +1 on Johnu's response, try flipping the spring end for end. I take it you've also driven it a few miles since getting it back together to let the suspension settle out. Good luck !!

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John Sigmund
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2/24/16 1:42pm - Reply: 'Re: Corvette rear height problem?'
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: 19507
Composite springs won't normally "sag" on just one side. If your spring bolts are adjustable, start there. Factory type bolts are not adjustable....they have a shoulder on them. Aftermarket bolts will be longer, and also be threaded farther up the shank of the bolt, and normally do not have any kind of a shoulder. Tightening the nut/bolt will raise that side, loosening will lower it.
Be sure to look very closely at the spring itself for ANY damage. Even a small scratch can cause a failure on one.

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Joel Adams
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2/24/16 5:46pm - Reply: 'Re: Corvette rear height problem?'
VetteCountry Lifetime Member
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Belvidere, IL - USA

Vette(s):
1977 Black T-Top ZZ4 5Sp 16in Wheels


Joined: 10/24/2004
Posts: 401
Hey Dave, did you check your body mounts? Just a thought.

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2/25/16 4:00am - Reply: 'Re: Corvette rear height problem?'
dads2vette Lifetime Member
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Ash Fork, AZ - USA

Vette(s):
1981 Red Interior White exterior

Joined: 4/18/2007
Posts: 1043
VetteCountry said: Hey Dave, did you check your body mounts? Just a thought.


Hey Dick, I haven't checked them. I would guess they are not in great shape. Tough thing about any of this is I don't have any place to conveniently look at the car from under it nor an abundance of time lately.

There wasn't any sag(that I noticed) prior to the work being done.  Doesn't mean it wasn't there.  I had checked it prior to the road trips and both sides were even. However, that was 7000 miles ago. 

Plenty of room on the adjustable bolts.  I'll inspect the spring and make sure it's good to go.

Thanks,
dave


____________________________________
Dave C..........My mantra: I can not be bought!!      Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"


Yeah, I know, Shut up Dave.
Lifetime Member #192


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