How much slip should be exposed on a slip yoke?

I just had a driveshaft made for my truck and there is about 1 1/4"-1 3/8" of the slip exposed between the seal and where the slip is machined stepped up. The output shaft sticks out a good inch or so beyond the seal. Does this sound about right?

[addsig]

Sounds ok as long as the fully lifted travel does not allow the slip to come closer than 1" of the end of the yoke.

FE

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I'm so depressed... My doctor refused to write me a prescription for Viagra. He said it would be like putting a new flagpole on a condemned building...

<font size=-1>[ This Message was edited by: FEandGoingBroke on 6/7/07 10:04am ]</font>

Dennysdriveshaft.com says "you need a min. of 3/4" slip- more than 1" is not neccesary"

Well, it depends some on how much your suspension moves. That's why they use slip yokes, to accomodate suspension travel. Cars are usually ok with the clearance mentioned above, some trucks with lift kits may need a good bit more.
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f100cleveland

The sounds like it's in line with the shafts I have had made ...

Certainly better to have a little too much slack rather than too little.
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The Driveline guy here said with all the weight on the wheels the yoke should be about 3/4 to 1" from all the way in.
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What I said makes more sence! [img]/forums/images/smiles/icon_razz.gif[/img]
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You guys would cringe if you saw how close my yoke is to the seal edge...about 1/4". There is about another 1/4" under the seal that the yoke would just push on the seal umbrella if it had to. So that's about 1/2" available. After my T5z converson I was concerned. I used trigonometry to figure the movement of the driveshaft and because of the driveshaft angle, etc, the yoke will move less than 1/4" over the entire travel of my rear end so it really depends on the configuration...a truck probably has more travel than my car so it probably moves more than 1/4" especially if the driveshaft angle is significant. I've driven the car for a few years now like this on the street and at road courses and no issues.

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<font size=-1>[ This Message was edited by: blkfrd on 6/9/07 12:21am ]</font>

Thanks for the replies guys. I called Gear Vendors tech today and they want no more than 5/8" slip showing. He said mine will vibrate really bad and wear the tailshaft bushing out very quickly. I talked to the driveshaft shop that did it and they are gonna work out a deal to make it right. Guess I'm gonna have to make limiter straps for my rear end cuz at full droop, it will push the yoke flush with the seal, so thats over an inch of movement in.
[addsig]

Don't underestimate the thought that some folks want to sound real smart in the face of a question ... (wouldn't necessarliy want to accuse Gear Vendors tech of this) ... but as long as there is enough spline inside (and remember how a bicylce stays upright) ... centrifigul force tends to "right a sphere" ... as long as there is enough spline "inside" you shouldn't have a problem. Maybe a little test drive is in order before we all panic.

Anyway, I'm most likely talking out of my patooty so I'll back off, I just hate to see anyone chasing a non-existent problem, just because, "somebody said."


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