Phasing the differential half-shaft yokes....
Thread Starter
Safety Car
Joined: Feb 1999
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From: Mexico Beach FL
Phasing the differential half-shaft yokes....
Ok, time to confess.
When you installed the yokes in your differential for the half-shafts, did you make sure the saddles for the universal joints, left vs right, were phased 90 degrees apart?
This is supposed to keep vibration down in the drive line.
Tom Piper
[Modified by Tom Piper, 4:39 PM 12/6/2003]
When you installed the yokes in your differential for the half-shafts, did you make sure the saddles for the universal joints, left vs right, were phased 90 degrees apart?
This is supposed to keep vibration down in the drive line.
Tom Piper
[Modified by Tom Piper, 4:39 PM 12/6/2003]
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 3,504
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From: Mexico Beach FL
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
As you go around a corner, they aren't going to stay at 90 degrees.
Does this really work?
I read this in my '63 shop manual.
Tom Piper
Does this really work?
I read this in my '63 shop manual.
Tom Piper
Former Vendor
Joined: Jun 2001
Posts: 7,204
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From: St Marys PA
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
Do you mean side to side...meaning right 1/2 shaft to left haftshaft? Or on the same 1/2 shaft?
The 1/2 shafts have molded sadles off them that do not allow different phasing of the u-joints. So this leads me to believe you mean phasing the 1/2 shafts side to side, which might smooth thing till you either spin your tires, or make a turn at which point you will mess that phasing all up. I guess what I am getting at is the 1/2 shafts are always phasing in and out past 90* of one another.
So I either do not get what your talking about, or you were fed wrong information, and hence the reason no-one has replied to you post. :cheers:
The 1/2 shafts have molded sadles off them that do not allow different phasing of the u-joints. So this leads me to believe you mean phasing the 1/2 shafts side to side, which might smooth thing till you either spin your tires, or make a turn at which point you will mess that phasing all up. I guess what I am getting at is the 1/2 shafts are always phasing in and out past 90* of one another.
So I either do not get what your talking about, or you were fed wrong information, and hence the reason no-one has replied to you post. :cheers:
Team Owner
Joined: Sep 2003
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
Once the limited slip diff has done its duty around any turn, the phase is gone. Right?
:cheers:
:cheers:
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 3,504
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From: Mexico Beach FL
Re: Phasing the differential half-shaft yokes.... (ski_dwn_it)
Do you mean side to side...meaning right 1/2 shaft to left haftshaft? Or on the same 1/2 shaft?
The 1/2 shafts have molded sadles off them that do not allow different phasing of the u-joints. So this leads me to believe you mean phasing the 1/2 shafts side to side, which might smooth thing till you either spin your tires, or make a turn at which point you will mess that phasing all up. I guess what I am getting at is the 1/2 shafts are always phasing in and out past 90* of one another.
So I either do not get what your talking about, or you were fed wrong information, and hence the reason no-one has replied to you post. :cheers:
The 1/2 shafts have molded sadles off them that do not allow different phasing of the u-joints. So this leads me to believe you mean phasing the 1/2 shafts side to side, which might smooth thing till you either spin your tires, or make a turn at which point you will mess that phasing all up. I guess what I am getting at is the 1/2 shafts are always phasing in and out past 90* of one another.
So I either do not get what your talking about, or you were fed wrong information, and hence the reason no-one has replied to you post. :cheers:
I'm thinking the same thing you are -- see my post above yours.
Maybe I am misunderstanding the '63 manual, but I think this is what it means.
I don't see how you can change phasing on one side.
Tom Piper
Race Director
Joined: Dec 2002
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
You guys who maintain that side-to-side phasing will be gained and lost through differential are correct. Whether the differential has limited-slip or not doesn't matter.
And one-piece driveshafts have proper phasing when they are assembled (hopefully).
I have to phase the driveshaft on my Chevy van...because it has a two-piece unit.
Larry
code5coupe
:seeya
And one-piece driveshafts have proper phasing when they are assembled (hopefully).
I have to phase the driveshaft on my Chevy van...because it has a two-piece unit.
Larry
code5coupe
:seeya
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 3,504
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From: Mexico Beach FL
Re: Phasing the differential half-shaft yokes.... (rocco16)
Ok, I dug the book out again.
If someone has a '63 Corvette shop manual, look on page 4-17 (Rear Axle section) half way down the left column under "Installation."
Do I see this correctly or not?
Tom Piper
If someone has a '63 Corvette shop manual, look on page 4-17 (Rear Axle section) half way down the left column under "Installation."
Do I see this correctly or not?
Tom Piper
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Melting Slicks
Joined: May 2002
Posts: 3,424
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From: Tucson Az
St. Jude Contributor
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
Kind-of a mute point IMHO? Even in the 60's was it, or was it not a posi? So the phasing would always keep changing??????
Interesting thinking though?????
Interesting thinking though?????
Burning Brakes
Joined: Oct 2003
Posts: 1,106
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From: Foresters Falls(near Ottawa) Ont
Re: Phasing the differential half-shaft yokes.... (edsalinas)
As was said above, makes no difference if it's Posi or not, the left/right axles will be out of phase before you back out of the shop! :seeya
Team Owner
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Re: Phasing the differential half-shaft yokes.... (RonJ)
:iagree:
Unless your connecting a two piece main driveshaft for a truck or something.
:cheers:
[Modified by JrRifleCoach, 5:09 PM 12/6/2003]
Unless your connecting a two piece main driveshaft for a truck or something.
:cheers:
[Modified by JrRifleCoach, 5:09 PM 12/6/2003]
Race Director
Joined: Sep 2000
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From: The Top of Utah
Re: Phasing the differential half-shaft yokes.... (Tom Piper)
Universal joints have to be "in phase" for the length of the shaft; between the power source and the driven member. The u joint phasing in the half shafts is established when the weld yokes are welded into the tubing. Any attempt to match rotational angles from one half shaft to the other would be... I couldn't find my 1963 service manual. This is the C4 Tech section. Will my 1983 manual do? Since most of us don't have 1963 manuals, can you quote what you are refering to, to us? Something doesn't make sense, here. Good luck, and...
RACE ON!!!
RACE ON!!!
Drifting
Joined: Feb 1999
Posts: 1,808
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From: CA central coast
Re: Phasing the differential half-shaft yokes.... (CFI-EFI)
I think you're reading too much into it; I suspect the instruction means to rotate the differential side yoke to be 90 degrees in relation to the axle shaft yoke so that the U-joint can be placed in it's proper position to be bolted in.
In short, I think the shop manual is simply stating the obvious, and that it has nothing to do with the two differential side yokes being 90 degrees with respect to each other.
In short, I think the shop manual is simply stating the obvious, and that it has nothing to do with the two differential side yokes being 90 degrees with respect to each other.
Thread Starter
Safety Car
Joined: Feb 1999
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From: Mexico Beach FL
Re: Phasing the differential half-shaft yokes.... (CFI-EFI)
From the '63 shop manual.
"Place driveshaft inboard trunnion into side gear yokes and assemble U bolts. Rotate yokes so that trunnion seats are phased 90 degrees apart."
If you ignore the C4 5 link suspension compared to the C2 3 link suspension, there is very little difference between the C4 and C2 when it comes to the rear driveline. I own a '64 and a '92. I think, because there are more C4 owners than C2 owners, I seem to get more people involved in a conversation on this forum. I also posted the link to this thread on the C2 forum.
Tom Piper
"Place driveshaft inboard trunnion into side gear yokes and assemble U bolts. Rotate yokes so that trunnion seats are phased 90 degrees apart."
If you ignore the C4 5 link suspension compared to the C2 3 link suspension, there is very little difference between the C4 and C2 when it comes to the rear driveline. I own a '64 and a '92. I think, because there are more C4 owners than C2 owners, I seem to get more people involved in a conversation on this forum. I also posted the link to this thread on the C2 forum.
Tom Piper
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 3,504
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From: Mexico Beach FL
Re: Phasing the differential half-shaft yokes.... (waynec)
I think you're reading too much into it; I suspect the instruction means to rotate the differential side yoke to be 90 degrees in relation to the axle shaft yoke so that the U-joint can be placed in it's proper position to be bolted in.
In short, I think the shop manual is simply stating the obvious, and that it has nothing to do with the two differential side yokes being 90 degrees with respect to each other.
In short, I think the shop manual is simply stating the obvious, and that it has nothing to do with the two differential side yokes being 90 degrees with respect to each other.
Sounds like it is too obvious for my mind to grasp -- kinda like telling me I have to breath.
When I read this in the manual, I remembered an article that compared u-joints to constant velocity joints. That article was talking about making sure u-joints were phased 90 degrees to cancel "whip" caused by the u-joints. But, with constant velocity joints, it wasn't necessary to phase them.
Tom Piper
[Modified by Tom Piper, 8:59 AM 12/7/2003]
