View Full Version : Very Confused - Driveshaft Length
69camarokid
03-29-2008, 08:29 PM
so im swapping an LT1 with T56 into a69 camaro. i had a custom driveshaft made for it. i noticed that when i slid the yolk of the new driveshaft into the tranny til it bottomed out, the the opposite end (rearend side) was about an inch and a half short of the differential side. I then slid the yolf out an inch and a half so it would reach the differential.
Is this normal. i would of theought the yolk would be all the way inside the tranny... can anyone tell me if this is how its supposed to be or did they do the measurements wrong on my new driveshaft??????
fast Ed
03-29-2008, 08:31 PM
Sounds fine. Driveshaft needs to have some room in the trans tailstock to keep from pounding out the trans innards as the rear suspension articulates.
cheers
Ed N.
paul67
03-30-2008, 11:54 AM
What is the length of the yoke ,and how much is going in the trans ?
David Pozzi
03-30-2008, 01:31 PM
The rear axle moves in an arc, farthest away from the trans when the front spring half is level.
1" is normal, 1.5" is getting a bit high, but probably ok.
What you do not want is for the yoke to ever bottom out, damage will result.
David
69camarokid
03-30-2008, 09:04 PM
What is the length of the yoke ,and how much is going in the trans ?
id say its about 6 or so inches long, with about an inch and a half sticking out.
69LT1Nova
03-31-2008, 01:54 PM
Sounds about right to me. As said before, there has to be some wiggle room for that driveshaft. :twothumbs
Is the rear end just hanging and the suspension in the rear unloaded or is it on jack stands? It doesn't sound too bad.
69camarokid
03-31-2008, 10:36 PM
nope, not lift or on jacks, this is as is, sitting on the ground.
69LT1Nova
04-01-2008, 02:35 PM
Doode, I stumbled across this webpage you should check out: http://www.9c1.com/technical/info/driveshaft.htm
Apparently to check to see if your driveshaft length is correct, just jam it into the transmission until it bottoms out. Then measure the distance between the u-joint and the pinion yoke. This should be less than 3/8". See below:
https://static1.pt-content.com/images/noimg.gif
eddiep
04-01-2008, 06:27 PM
I've heard a good rule of thumb is 1/2" minimum slip yoke travel for a mild build, and 3/4" to 1" for something that's got a lot of power and/or will be launching hard at the drag strip. Anything over 1" of travel at ride height and you might have to worry about the yoke to output shaft spline engagement.
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