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rear suspension help

bps3520

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Joined
Jun 3, 2007
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3
Location
Tennessee
Hopefully someone hear can help me. I am installing a 76 vette rear suspension in a hot rod and have some questions about the factory vette setup. At ride height, should the driveshaft and half shafts be level with the ground or at a slight angle? If angled, what is the correct angle? Also, what angle does the pinion and transmission need to be at?

Thanks
 
Joined
Apr 29, 2001
Messages
2,141
Location
Rio Rancho, NM
Corvette
1981 HD Suspension; ZN1 Option
Hopefully someone hear can help me. I am installing a 76 vette rear suspension in a hot rod and have some questions about the factory vette setup. At ride height, should the driveshaft and half shafts be level with the ground or at a slight angle? If angled, what is the correct angle? Also, what angle does the pinion and transmission need to be at?

Thanks


They're at a slight angle (in the neighborhood of 20 -26 degrees perhaps). I can research that tonight, and I believe that there is an image of it on the assembly book.
 

Peer81

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Joined
May 21, 2003
Messages
2,497
Location
Netherlands
Corvette
'81 Black
You never want the drive-shaft and strut-rods to be equal (level) to each other). One exception is if you dragrace... If the shafts would be equal you wouldn't get any camber gain in the corners = lose tire contact in the corners. If you want to get it right, go to a garage. They can set the correct camber with there equipment. Good luck :)

Groeten Peter
 
Joined
Jan 1, 2002
Messages
7,246
Location
Washington, Michigan
Corvette
'67 Marina Blue Convertible
Hopefully someone hear can help me. I am installing a 76 vette rear suspension in a hot rod and have some questions about the factory vette setup. At ride height, should the driveshaft and half shafts be level with the ground or at a slight angle? If angled, what is the correct angle? Also, what angle does the pinion and transmission need to be at?

Thanks

At normal ride height the half-shafts angle downward toward the outside about 3 degrees or so. What's more important is that they're mounted such that they're angled forward about 3 degrees in a top view, so the U-joints always see some motion of the needle bearings in the trunnions, regardless of the (variable) angle in the rear view.

The down-angle of the transmission output shaft should be the same as the up-angle of the pinion (lines extended from the centerline of each should be parallel); you don't want them exactly in line, for the same reason - unless the needle bearings move relative to the trunnions in the U-joints, they'll brinell and fail. Most production installations are 4 degrees or less.

:beer
 

bps3520

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Joined
Jun 3, 2007
Messages
3
Location
Tennessee
Thanks for the help. I thought there should be a slight angle up and down, but was unaware of the front to back angle.

If I remember correctly, the driveshaft angles up from the transmission instead of down. Am I crazy, or is that correct?

Thanks again
 
Joined
Jan 1, 2002
Messages
7,246
Location
Washington, Michigan
Corvette
'67 Marina Blue Convertible
If I remember correctly, the driveshaft angles up from the transmission instead of down. Am I crazy, or is that correct?

Thanks again

I've never seen any car where the driveshaft angles up from the transmission output shaft. :)
 

Peer81

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Joined
May 21, 2003
Messages
2,497
Location
Netherlands
Corvette
'81 Black
I think its almost impossible! The transmission yoke is about 3" above the crossmember and the diff yoke 0.5". :)

Groeten Peter
 

bps3520

New member
Joined
Jun 3, 2007
Messages
3
Location
Tennessee
I didn't think that was right, but that's how I measured it on a friend's vette. I must have done something wrong. I'm going to take another look at it next week. Thanks for all the help.
 

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