please help with Half shaft problem
Thread Starter
Instructor
Joined: Sep 2010
Posts: 157
Likes: 0
From: Rockwood TN
please help with Half shaft problem
I corvette manual says the half shafts should be 90 degrees apart.The half shafts on my 76 won't stay 90 degrees apart.Is the posi unit bad or is there a way to adjust them or what.I really need help with this.Any answers please.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Don't worry how they are when installed. They are constantly changing as you go around corners. They spin at different rates when going around corners. This question is asked about once a month and the answer is always the same. Just install them and go drive. Check them later they will be in different positions.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Mike...
Can you give me the specific 'section' and 'page' where that reference is made? I want to read it myself to try understanding what context they could be referring to for "90* from each other". That's just wierd.
Can you give me the specific 'section' and 'page' where that reference is made? I want to read it myself to try understanding what context they could be referring to for "90* from each other". That's just wierd.
Instructor
Joined: Sep 2008
Posts: 216
Likes: 0
From: Eugene OR
I just redid my rear suspension and ran into the same thing in my white/red Corvette shop manual. I called for advice from an old friend and got the same advice you've seen here. "Just ignore that". I slapped 'em in at far from 90 degrees and I've been driving all summer without incident.
Hope that helps!
Hope that helps!
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Race Director
Joined: Jul 2001
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Page 4-42, Installation. Para 1, ........Rotate yokes so that trunnion seats are phased 90* apart. Figure 100- Axle Driveshafts on the same page also shows the 90* apart.
Cruising
Joined: Feb 2006
Posts: 11
Likes: 0
From: tx
i think what they mean is, remember the old driveshafts that had the slip yoke that was splined and you could put it back together so it wasnt at 90 degrees. no way to do that on one with out the slip yoke.
Melting Slicks
Joined: Jun 2009
Posts: 2,343
Likes: 4
From: Anderson SC
Ignore it - or not - no matter.
-W
Thread Starter
Instructor
Joined: Sep 2010
Posts: 157
Likes: 0
From: Rockwood TN
Sure just as soon as I get back in town,Its in the chiltons manual
Melting Slicks
Joined: Jun 2009
Posts: 2,343
Likes: 4
From: Anderson SC
Bob, it's in all the manuals - ignore it.
Even if you set them initially to be 90 degrees out of phase - as soon as you turn a corner the differential effect will allow them to move at will. If you understood how it works enough to be working on it yourself - this would be a self evident truth.
-W
Even if you set them initially to be 90 degrees out of phase - as soon as you turn a corner the differential effect will allow them to move at will. If you understood how it works enough to be working on it yourself - this would be a self evident truth.
-W
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
I rebuilt my rear end and didn't worry about the angle difference between the half-shafts. I've been driving it for a couple months and everything works fine. I agree with the other posts. Your half-shafts will rotate at different speeds, so the angle between them will change all the time. Good luck.