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Driveline Length

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Old Sep 1, 2018 | 02:53 PM
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Default Driveline Length

Ok Guys,
There's still about 2&3/8ths of an inch inside the transmission.

Do you think this will be ok, or should I extend it 3/4" or so?

Pat

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Old Sep 1, 2018 | 04:36 PM
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Default ? Year

what year car?
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Old Sep 1, 2018 | 08:06 PM
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It's a '63, but the transmission is a super T10. So it has the turbo 400 yoke on it.

Pat
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Old Sep 1, 2018 | 08:17 PM
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Call a company that makes drive shafts and chat with them about engagement length.....
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Old Sep 1, 2018 | 08:28 PM
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Here is a discussion I found...

https://www.bangshift.com/forum/foru...ment-is-enough


if you want more info, google “driveshaft yoke engagement”. I think you can find what you are looking for....
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Old Sep 1, 2018 | 08:32 PM
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Can't tell from your pic. but if the yolk extends into the transmission far enough to be fully supported by the tail shaft bushing, you're fine. Here's a pic. of how they looked with an original trans. and yolk.


Last edited by 1snake; Sep 1, 2018 at 08:40 PM.
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Old Sep 1, 2018 | 08:46 PM
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Are you making any HP ?? Then reason I ask is, that looks like the skinny 2" driveshaft. I just had a new shaft made for my 60 and the shop wanted 1/2 to 3/4" between the yoke and seal. I run my car pretty hard so I went with a 2 3/4" shaft . BTW most of the C-3 shafts I looked at were 2 1/2 "
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Old Sep 1, 2018 | 09:05 PM
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Originally Posted by 1snake
Can't tell from your pic. but if the yolk extends into the transmission far enough to be fully supported by the tail shaft bushing, you're fine. Here's a pic. of how they looked with an original trans. and yolk.
Thanks Jim,

Looks like I should be ok.

Pat
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Old Sep 1, 2018 | 09:17 PM
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Originally Posted by Pop Chevy
Are you making any HP ?? Then reason I ask is, that looks like the skinny 2" driveshaft. I just had a new shaft made for my 60 and the shop wanted 1/2 to 3/4" between the yoke and seal. I run my car pretty hard so I went with a 2 3/4" shaft . BTW most of the C-3 shafts I looked at were 2 1/2 "
Hey Pop,
I'm "hoping" to make some horsepower. Somewhere near 400. It's an original 340 hp car, with the original motor, heads etc. I did remain with a solid cam, but changed the specs a bit to gain some torque a bit sooner than stock. Also, enlarged the valves to the 2.02, unshrouded the chambers, and quite a bit of head work on the flow. So it should be at least 375, and hopefully closer to 400.

But you're right, it is a 2" driveline. And I definitely don't pamper the cars when I drive them!

Pat
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Old Sep 1, 2018 | 09:19 PM
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Originally Posted by firstgear
Call a company that makes drive shafts and chat with them about engagement length.....
Hello Herb,

Yes I did contact a local drive shaft company. He thought I would be fine, but I just wanted to hear what you guy's thought.

One of those things, I should leave well enough alone!

Pat
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Old Sep 1, 2018 | 10:30 PM
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If you lengthen it too much you might not be able to get it in. Looks good to me.
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Old Sep 2, 2018 | 10:40 AM
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Looks good to me. Remember the C2 differential is fixed so there is little linear movement of the driveshaft.

However, you might want to revisit the diameter (strength) of the driveshaft and ujoints.
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Old Sep 2, 2018 | 01:42 PM
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I've seen the small diameter drive shafts used in race cars for years. I don't see it as an issue.
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Old Sep 2, 2018 | 04:10 PM
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Default Just depends

on how much power your making and how much bite your getting. I have also seen them twisted like a pretzel.
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Old Sep 2, 2018 | 06:46 PM
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Remember that 250hp Powerglides and 560hp L-88's all used the SAME driveshaft.

If you set it up with too much penetration (inadequate gap between the front of the yoke and the end of the extension housing), you won't be able to remove it unless you pull the body or cut the driveshaft.

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Old Sep 2, 2018 | 06:55 PM
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Originally Posted by JohnZ
Remember that 250hp Powerglides and 560hp L-88's all used the SAME driveshaft.

If you set it up with too much penetration (inadequate gap between the front of the yoke and the end of the extension housing), you won't be able to remove it unless you pull the body or cut the driveshaft.

Thanks John,

Honestly I think I'm getting down into the weeds a little too much! At the very most, I could probably only have it extended about 1/2".

I'm thinking I'm just going to go with it as it is.

Also, thanks for the information on the driveshaft diameter. Again....I start over-thinking things when I really don't need to.

Pat
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