Another Rear End Question(s)
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 44
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Another Rear End Question(s)
Hi all, I'm a recent convert to this forum but wish I had found it five years ago when I started a chassis-up resto of my '70 LS5 Roadster. Anyways, thanks for the wealth of information I've discovered since on this forum.
I do have a couple of rear end questions I'm hoping I can get some help with. The posi diff ran well and was quiet. So it was one of the few bits of the car that I was going to leave well enough alone!.
On removal and inspection on the bench I found the side yokes with the following end play .037" LHS & .050" RHS. On advise from another Vette owner I ordered two new side yokes assuming that the originals were worn out to the circlips. When the new ones arrived I popped the cover off the diff to discover the original side yokes looked fine. No mushrooming and circlips still in place. The centre spider gear pin was also pretty much un-touched. Hmmm?
I paid for the new yokes for I figure I may aswell fit them. After a little research on the forum it appears that the posi traction shimming also plays a role in yoke end play.
So, finally to my questions;
1. Can I shim up the posi mechansim without having to dis-assemble the rest of the diff?
2. Will this give me the desired .007 - .010" side yoke end play?
3. Can anyone guide me on the steps to do this and suggest any tips that may be useful?
Thanks in advance. Brock
I do have a couple of rear end questions I'm hoping I can get some help with. The posi diff ran well and was quiet. So it was one of the few bits of the car that I was going to leave well enough alone!.
On removal and inspection on the bench I found the side yokes with the following end play .037" LHS & .050" RHS. On advise from another Vette owner I ordered two new side yokes assuming that the originals were worn out to the circlips. When the new ones arrived I popped the cover off the diff to discover the original side yokes looked fine. No mushrooming and circlips still in place. The centre spider gear pin was also pretty much un-touched. Hmmm?
I paid for the new yokes for I figure I may aswell fit them. After a little research on the forum it appears that the posi traction shimming also plays a role in yoke end play.
So, finally to my questions;
1. Can I shim up the posi mechansim without having to dis-assemble the rest of the diff?
2. Will this give me the desired .007 - .010" side yoke end play?
3. Can anyone guide me on the steps to do this and suggest any tips that may be useful?
Thanks in advance. Brock
Instructor
Joined: Mar 2003
Posts: 195
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From: Eagle Wi
That's a question I was wondering about also. How do you adjust the slop in the side yokes.
Also I want to understand if the clips that hold the yokes in actually take any loading. Our rear ends are a three link system. The halfshaft, the camber rod, and the trailing arm. With weight on the car it clearly loads the halfshaft and pushes in. Does anyone know when cornering is it possible that the force vector changes direction and pulls on the halfshafts or is the geomentry such that it can not happen.
I would assume that if the wheel leaves the road it must pull. I understand there are millions of miles of durability testing out there but it always looked a little iffy to me.
Also I want to understand if the clips that hold the yokes in actually take any loading. Our rear ends are a three link system. The halfshaft, the camber rod, and the trailing arm. With weight on the car it clearly loads the halfshaft and pushes in. Does anyone know when cornering is it possible that the force vector changes direction and pulls on the halfshafts or is the geomentry such that it can not happen.
I would assume that if the wheel leaves the road it must pull. I understand there are millions of miles of durability testing out there but it always looked a little iffy to me.
Tech Contributor
Joined: Aug 1999
Posts: 15,154
Likes: 3,959
From: Connecticut, USA
Brock I PM'd you info for your questions.
This running post will help you too.
http://forums.corvetteforum.com/show...684&forum_id=3
Just replacing the yokes will not get endplay under .010 in most cases. The clutches are shimmed sloppy when setup stock and this along with wear will give endplay.
My friend Monza knows this,right?
This running post will help you too.
http://forums.corvetteforum.com/show...684&forum_id=3
Just replacing the yokes will not get endplay under .010 in most cases. The clutches are shimmed sloppy when setup stock and this along with wear will give endplay.
My friend Monza knows this,right?
