C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Driveline Components
Not Logged In! Login or Register!  Users Online: 9 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
Mid America Motorworks
Bair's Corvettes
CorvetteClothing.com
VetteBookStore.com
Volunteer Vette Products

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
BLISS
RayCraze
Featured Links

Buy Now
The Corvette Dynasty (Hardcover)
The Corvette Dynasty (Hardcover)


Corvette 50th Anniversary
Corvette 50th Anniversary


GM Corvette 1963-82 (Chilton's Total Car Care Repair Manuals) (Paperback)
GM Corvette 1963-82 (Chilton's Total Car Care Repair Manuals) (Paperback)


Collector's Originality Guide Corvette 1968-1982 (Paperback)
Collector's Originality Guide Corvette 1968-1982 (Paperback)



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
10/1/09 3:44pm - Original Message: 'Rear end noise'
Madrider
Former Member
- Send Private Message


Robersonville, NC - USA

Vette(s):
76 stingray

Joined: 4/23/2009
Posts: 47

Hi all,

Ok here is my delima. I am still working on the Vette before I put it on the road. Well I was checking out the rear brakes and rear suspension. I decided to crank it up and let the rear wheel turn. Well there was a thunk, thunk thunk noise coming from the rear end. The right rear rotor is warped so I too it off to see if that might be it. Well it wasn't! (surprise) Then I thought, well let me take the half shaft out and see if it still does it. When I did this the noise went away. The u-joints seam to feel pretty good. Nice and smooth through all positions and movement. The ony thing that I can think now is it is in the Trailing arm. The bearing maybe? It doesn't seem to feel bad or have any free play in it as I can tell. It is a little hard to turn though. (stiff) I didn't do anything to the driver side, but I did notice some vibrating (movement) as the rear end turned it.  What could this be? Is this something a trailing arm could do? Could it be the rear end? I hope not!
 
Please help me out here. I need to get it fixed, but don't want to be spending anymore than I have to right now.
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
10/1/09 8:02pm - Reply: 'Rear end noise'
ranger3 Lifetime Member
Lifetime Member
- Send Private Message


North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
If I an reading this correctly it sounds like you had the car on a jack or jackstands with the rear wheels clear of the ground. You had the car in gear with the rear wheels turning. If this is the case and the trailing arms were not supported, then both half shafts were suspended at angles far beyond the norm. This puts excessive loads on the u-joints and yokes. That's why you didn't hear it when you removed the shafts. I would not reuse those u-joints. Hope this helps.
Scott


____________________________________

C3VR Lifetime Member #114


 Reply Reply  Quote Reply w/Quote
10/1/09 8:28pm - Reply: 'Rear end noise'
BKVETTE
Former Member
- Send Private Message


Calhoun City, MS - USA

Vette(s):
1977 Black T-Top

Joined: 9/24/2005
Posts: 121
As Ranger have stated. You're not dealing with a Solid  Axle car.  Your load is riding on those U-Joints. When you jack it up.

____________________________________
Kenny P   '77 L82 Black on Black Vette

Click for larger image
 Reply Reply  Quote Reply w/Quote
10/1/09 9:10pm - Reply: 'Rear end noise'
Madrider
Former Member
- Send Private Message


Robersonville, NC - USA

Vette(s):
76 stingray

Joined: 4/23/2009
Posts: 47
You are right. I have the car up on jack stands. I thought about that also (u-joints being at to much of a angle) but wasnt sure. What I dont understand is, I took out the right half shaft, the left is still in the car, and the noise is gone.   
Thats cool, I was planning on replacing the u-joints anyway.
Thanks for your help.


____________________________________
 Reply Reply  Quote Reply w/Quote
10/2/09 11:51am - Reply: 'Rear end noise'
Autom8r
Former Member
- Send Private Message


Old Hickory, TN - USA

Vette(s):
1978 L-82 Silver Anniversary hotrod. /////////////

Joined: 5/26/2003
Posts: 599
While you have the ass end in the air, replace all 4 u-joints. There is no such thing as one bad axle u-joint on a C3 'Vette.... about 20 bucks apiece at Advance Auto Parts..

Dave

____________________________________
Nashville, Tennessee, USA
///////////////////////////////////////////////////////////////
Hot rods, beer, boats, guns and babes. I love the USA!!!!

 Reply Reply  Quote Reply w/Quote
10/2/09 3:42pm - Reply: 'Rear end noise'
KDADDY79
Former Member
- Send Private Message


Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484
While you're back there, you may want to change the rear diff. fluid and add some GM Posi Lube Additive.
Even if it's not the cause of the (U-Joint) noise it's a good piece of insurance for the rear diff.
Cant hurt.
Kevin


____________________________________
 Reply Reply  Quote Reply w/Quote
10/2/09 8:04pm - Reply: 'Rear end noise'
Madrider
Former Member
- Send Private Message


Robersonville, NC - USA

Vette(s):
76 stingray

Joined: 4/23/2009
Posts: 47
Is there a way to check the bearings in the trailing arms?  The bushings on the arms are shot so it kinda hard to tell if there is any movement in them.  I recken what I am asking, is how would I know if they need replacing. Madrider2009-10-03 05:38:58

____________________________________
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Driveline Components
(Moderator: Adam Wartell, Norsky, Adams' Apple)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30