Slip Yoke
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Slip Yoke
I have a 79 L-48 with the original automatic transmission. The slip yoke that I removed was a 27 spline slip yoke and apparently is no longer manufactured even in the aftermarket realm. So, what years of corvette have this odd 27 spline slip yoke?
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
This is what I thought but after further research there are two different slip yokes used. The M20 (manual 31 spline) and M38 (automatic 27 spline). The one that I have is no longer manufactured, rebuilt or found. I sent it to a drive shaft specialist for further review with the same result.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
This is what I thought but after further research there are two different slip yokes used. The M20 (manual 31 spline) and M38 (automatic 27 spline). The one that I have is no longer manufactured, rebuilt or found. I sent it to a drive shaft specialist for further review with the same result.
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
My slip yoke is in good shape so I'm fortunate not to need another. If I were to purchase a USED one I would want to see detailed pictures to see what I'm getting and the price would have to match the product. I could get a NOS off of Ebay for $125.
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Thanks, Larry. In 79, automatic transmission type was 3 speed turbo hydra-matic 350 with a 3:55:1 rear. I'm assuming most vette's with the same transmission had the same type of slip yoke? AND they would be the same for Auto and Manual???
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
The automatic was the TH350 and took the smaller yoke; the manual trans may have been either of two types, the ST-10 and a Muncie or Saginaw 4 speed, but I'm not sure about the latter. One of these 2 manual transmissions may have had the smaller tailshaft and would take the smaller yoke. Perhaps someone who knows the transmission options for 79 can ring in here.
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Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Well, I had sent the drive shaft and slip yoke to "Denny's Drive Shaft" in NY. New spicer u-joints installed, shaft balance inspected and slip yoke polished. I installed a new rear transmission output shaft seal along with the drive shaft and all is well. So, if you need any specialized or custom corvette drive shaft, half shaft or u-joint work done then this is the place for you: http://www.dennysdriveshaft.com/c29_corvette.html
