Yoke engagement question
Yoke engagement question Anyone see a problem with the amount of engagement here? The mark closest to the u joint down to the input end marks how much is engaged on the output shaft of the trans. That leaves a little less than half of the slip yoke "non engaged" the car has solid motor mounts and a rubber trans mount.
I can always extend the driveshaft but this is what I got after trans swap.
I can always extend the driveshaft but this is what I got after trans swap.
Last edited by oscs; Jun 21, 2015 at 04:14 PM.
I normally shoot for about 3/4 inch from being fully in with the car on the ground. Did you check it in the air and the rear hanging? If so put a jack under the rear and get weight on the springs.
Yoke engagement question
Originally Posted by Taxman20
I normally shoot for about 3/4 inch from being fully in with the car on the ground. Did you check it in the air and the rear hanging? If so put a jack under the rear and get weight on the springs.
Ok, I see. Yea your rear center section stays where it is. Depending on the power you are making, you should be ok. Its not going to move out more than it is now since nothing is going to move. But if you make a bunch of power I would get it in as far as possible.
depending on the trans, some of the output shaft sticks out past the seal, so you actually have more spline than a seal might show
Stick the yoke in all the way, then meas how much you pull out to hook the shaft up
I shoot for around 3/4" pull out with rear loaded
Stick the yoke in all the way, then meas how much you pull out to hook the shaft up
I shoot for around 3/4" pull out with rear loaded
Yoke engagement question
Originally Posted by forcd ind
depending on the trans, some of the output shaft sticks out past the seal, so you actually have more spline than a seal might show
Stick the yoke in all the way, then meas how much you pull out to hook the shaft up
I shoot for around 3/4" pull out with rear loaded
Stick the yoke in all the way, then meas how much you pull out to hook the shaft up
I shoot for around 3/4" pull out with rear loaded
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From: Norn Iron
When you see how little splines engage on either driveshafts/axles within the diff, or a clutch disc on an input shaft...
Really, whilst you could have more on that spline/yoke, it really is plenty.
And the axles/stubs/shafts receive far more torque than the output shaft of the trans does.
Really, whilst you could have more on that spline/yoke, it really is plenty.
And the axles/stubs/shafts receive far more torque than the output shaft of the trans does.
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Yoke engagement question
Originally Posted by stevieturbo
When you see how little splines engage on either driveshafts/axles within the diff, or a clutch disc on an input shaft...
Really, whilst you could have more on that spline/yoke, it really is plenty.
And the axles/stubs/shafts receive far more torque than the output shaft of the trans does.
Really, whilst you could have more on that spline/yoke, it really is plenty.
And the axles/stubs/shafts receive far more torque than the output shaft of the trans does.
Since I don't have to change a thing or spend any money I'm going to subscribe to this theory. Is it ideal? No. Will it work? Probably and I think I'm cool with that.
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Are you getting any vibrations? What can happen when the driveshaft is too short and there isn't enough spline support to stabilize the yoke, the front u-joint can start "jump roping" which will cause a vibration. With an IRS car, I would want that yoke in as far as possible and leave 1/2" before the yoke bottoms out against the output shaft.
Also, do the splines inside the yoke extend all the way to the front tip of the yoke? I bet not.
Andrew
Also, do the splines inside the yoke extend all the way to the front tip of the yoke? I bet not.
Andrew
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Joined: Jun 2013
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From: Avon, Ohio
Mine has less engagement than that-I was concerned at first, but it does not vibrate and has held up to the abuse I have put it through thus far, so I have stopped worrying about it. 
Thats a great point! I will have to take a peek next time I have my D shaft off
Thats a great point! I will have to take a peek next time I have my D shaft off
Are you getting any vibrations? What can happen when the driveshaft is too short and there isn't enough spline support to stabilize the yoke, the front u-joint can start "jump roping" which will cause a vibration. With an IRS car, I would want that yoke in as far as possible and leave 1/2" before the yoke bottoms out against the output shaft.
Also, do the splines inside the yoke extend all the way to the front tip of the yoke? I bet not.
Andrew
Also, do the splines inside the yoke extend all the way to the front tip of the yoke? I bet not.
Andrew
The splines run the length of the yoke. Why would you want extensive engagement on an IRS car? the Diff is fixed to the car and has zero travel.
Andrew
Since you are not concerned with movement you can take advantage of having more spline engagement and lesson the chance of twisted splines etc. That is what I would guess he is getting at.
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Joined: Jun 2013
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From: Avon, Ohio
My latest Cougar build has this beauty installed:
The CV joints have some play in them and I don't have to be concerted about driveline angles anymore!
Andrew