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Old Feb 25, 2018 | 03:38 PM
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Default Half shaft

Are there 2 different width half shafts for the 63 to 82 cars. I bought a set from a member here and they were 13 1/2 inches. Mine were 15 1/2. And the flanges were different. He said the were from a 66. They should be the same.
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Old Feb 25, 2018 | 06:27 PM
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80-82 were a different length (IIRC) otherwise the 63-79 were the same length but the diameter changed (75?) from 2.5 to 3, again IIRC, that said I thought it was only a little shorter, like 1/2" or so
M

Last edited by Mooser; Feb 25, 2018 at 06:31 PM.
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Old Feb 25, 2018 | 06:30 PM
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15-1/2 doesn't ring any bells, are you measuring center of u-joint to center of u-joint? Just checked and 13 7/8" should be a stock length 63-79 as far as I can tell

M

Last edited by Mooser; Feb 25, 2018 at 06:33 PM.
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Old Feb 25, 2018 | 06:59 PM
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Originally Posted by Mooser
15-1/2 doesn't ring any bells, are you measuring center of u-joint to center of u-joint? Just checked and 13 7/8" should be a stock length 63-79 as far as I can tell

M

I am measuring end to end and it is 15 3/8. They are 13 7/8 from center to center. The ones I got were 2 inches shorter. They looked exactly the same except shorter.
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Old Feb 25, 2018 | 07:33 PM
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Anythings possible and I'll wait for someone more knowledgeable than me (shouldn't take long)

C4 half shafts are longer I believe so it's not them
M
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Old Feb 25, 2018 | 07:53 PM
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Originally Posted by Mooser
Anythings possible and I'll wait for someone more knowledgeable than me (shouldn't take long)

C4 half shafts are longer I believe so it's not them
M
Guy said it was a C2. Flange was odd looking. The 4 holes were very close together.

Last edited by 540 vette; Feb 25, 2018 at 07:53 PM.
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Old Feb 25, 2018 | 08:26 PM
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Again, anything is possible

But if you have a look at Dennys, mid-america or Vansteel they list one part number for 63-79 so I've no idea what they might be.

Center of u-joint to center of u-joint 2" shorter (forget about flanges or anything else, just the shaft)
M
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Old Feb 26, 2018 | 07:38 PM
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No other thoughts on what the short shafts could be from.
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Old Feb 26, 2018 | 07:40 PM
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Maybe post a picture, someone might recognize the end plates
M
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Old Feb 26, 2018 | 09:09 PM
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Originally Posted by Mooser
Maybe post a picture, someone might recognize the end plates
M
I sent them back. There is no picture needed. The half shafts looked exactly like my 72's except they were 2 inches narrower.
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Old Feb 27, 2018 | 08:15 AM
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Originally Posted by 540 vette
I sent them back. There is no picture needed. The half shafts looked exactly like my 72's except they were 2 inches narrower.
Guess I misunderstood
Originally Posted by 540 vette
Guy said it was a C2. Flange was odd looking. The 4 holes were very close together.
M
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Old Feb 27, 2018 | 01:33 PM
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Originally Posted by Mooser
80-82 were a different length (IIRC) otherwise the 63-79 were the same length but the diameter changed (75?) from 2.5 to 3, again IIRC, that said I thought it was only a little shorter, like 1/2" or so
M
The late models with the aluminum differential had 'lightened' driveshafts as a system with the new fiberglas spring and the alum. diff.
They did that because they didn't need such robust and heavy driveshafts for 'only' 200 hp. Different U joints as well.

Good luck! Unkahal
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