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: 21 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

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

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

Vanity Plates
BAD-SVET
yellownredvette
Featured Links

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


The Corvette Factories: Building America's Sports Car (Hardcover)
The Corvette Factories: Building America's Sports Car (Hardcover)


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]  
8/21/12 8:56pm - Original Message: 'Yoke wiggle'
tttanker Gold Member
Gold Member
- Send Private Message


Peru, IN - USA

Vette(s):
1978 Blue Edition 2001 Torch Red

Joined: 6/2/2010
Posts: 82
Poking around checking my driveline and found my tranny yoke has a wiggle in it that shouldn't be there,  Took it to my friendly tranny shop thinking it was the yoke bushing in the tailshaft . Not so. Bushing good.  Output shaft nice and tight. Slide yoke on output either part way or all the way and it's loose on the shaft. Good wiggle. Tranny guy says the yoke is worn. Tranny is a muncie M-20 and it's numbers say it came out of a 73 chevelle. My drivehaft ( I assume its the factory 78 vette driveshaft.) has the u-bolt style u joints where it joins the tranny yoke. Questions are :1)  should a vette driveshaft yoke fit ok on a M-20 output shaft, 2) all chevy yokes in this era the same  diameter ( teeth numbers are different) 3) anyone know of yokes wearing enough to wiggle.

____________________________________
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
8/21/12 9:23pm - Reply: 'Re: Yoke wiggle'
Adams' Apple Lifetime Member
Lifetime Member
Moderator
- Send Private Message


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: 19542
I'll reply to your question with a question.... Is it leaking?
If not, then you really don't have a problem. The yoke will typically have some play in it. The issue is how much? If it's leaking, then you would have a problem that needs to be corrected, but if it ain't leaking, I would say it's not really anything to worry about.
If your trans guy said the yoke was worn, but there is nothing wrong with the bushing, he's not telling you the truth, for whatever reason. If the yoke, a hardened metal part is worn, you can bet yer booties the bushing, a soft metal, is also worn....in which case it should be leaking.
The problem with changing the yokes on these cars is, there ain't nothing else gonna work BUT a Corvette yoke. And they ain't cheap these days.

I would suggest, if it is not leaking back there, and you don't have a vibration, fuggedabouit. Thumbs Up

____________________________________
Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
 Reply Reply  Quote Reply w/Quote
8/22/12 7:19am - Reply: 'Re: Yoke wiggle'
tttanker Gold Member
Gold Member
- Send Private Message


Peru, IN - USA

Vette(s):
1978 Blue Edition 2001 Torch Red

Joined: 6/2/2010
Posts: 82
Thanks for reply Joel.  Nice and dry at yoke, no leaks. Tranny guy pulled bushing out while I was watching,  I was wondering how they do it, slid it on the yoke and it was tight. Put a new bushing and rear seal in and wiggle was still there. He said the same thing you did. Harden steel won't wear before a bushing. He knows the tranny and driveshaft are not the same age. He charged me twenty bucks. He's a car guy, even though its GTO's and Trans Am's.  I've got around 2000 miles on crate motor and it's runs great. Love the tranny . I do have a slight vibration over 70MPH is why I was looking at driveline. I had changed all six u-joints, new tires and aligned after rebuild. I forgot to change tranny mount so I may do that. Rear bearings seem okay. It's not a bad vibration. I may of forgot how vibartions were not even noticed back before these limos we drive today came out. I believe some GM cars , like the chevell's had pressed in U-joints on the front yoke and not the open end  ones like the vette.  Thinking the diameter was a little different.  I am putting in a new rear spring. Right now it has a 2 1/4 inch, 7 leaf. Going to stick with that since it looks original. Tranny guy broke the four mount bolts loose, shot some lube on them for me and retighten them so I won't have to struggle. He told me to be sure I have wheels on the ground before I do the final tighening on the four bolts when installing the new spring. The old spring is flat and even sags a liitle. Thanks again.

____________________________________
 Reply Reply  Quote Reply w/Quote
8/22/12 9:06am - Reply: 'Re: Yoke wiggle'
tttanker Gold Member
Gold Member
- Send Private Message


Peru, IN - USA

Vette(s):
1978 Blue Edition 2001 Torch Red

Joined: 6/2/2010
Posts: 82
Went to order leaf spring and saw where some jobbers state the 7  leaf spring is a little heavy for street use. All I have to go by is I'm  riding around on a worn out 7 that I'm sure has lost over 50% of its manufactured specs. There is not a rear sway bar on my chassis. Thinking I should go with a 9 leaf, 2 1/4 if they make such a thing. Any thought?

____________________________________
 Reply Reply  Quote Reply w/Quote
8/22/12 12:26pm - Reply: 'Re: Yoke wiggle'
Adams' Apple Lifetime Member
Lifetime Member
Moderator
- Send Private Message


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: 19542
I think most of the aftermarket springs will be far stiffer than original, according to the specs I've seen listed. Eaton  is the ONLY company that makes exact rated springs, but I have no idea how you could get the springs directly from them.
That being said, I would have to say if I was going to replace mine, I would find the lowest rated spring available, since I don't care about autocrossing, or any other kind of racing...I just wanna ride, and ride comfortably.


____________________________________
Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
 Reply Reply  Quote Reply w/Quote
8/22/12 1:04pm - Reply: 'Re: Yoke wiggle'
tttanker Gold Member
Gold Member
- Send Private Message


Peru, IN - USA

Vette(s):
1978 Blue Edition 2001 Torch Red

Joined: 6/2/2010
Posts: 82
Thanks for the tip. Don't want anything stiffer so I'll probably do some research and look for a around 260-280. Thanks

____________________________________
 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 2001-2018, 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