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How much slip on my slip yoke?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by SAVAGE1, Nov 19, 2001.

  1. SAVAGE1

    SAVAGE1 1/2 ton status

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    I just put in an extended rear driveshaft between my NP208 and 14B FF. The slip yoke going into the 208 has about 3/4" of silver showing before it will bottom out onto the Tcase. It seemed kinda too close for me so I had someone look at the clearance while I hopped on the rear bumper... trying to get it to hit. It didn't come close but will this be a problem? How much extra yoke should be showing to be on the safe side? I know someone, <font color=orange>wayne</font color=orange>? broke his slip yoke cause his driveshaft was too long. I don't want it to happen to me. Thanks in advance.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  2. FWP

    FWP CRS

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    I hope this helps you, here's what I measured on my SWB 208.

    I took some dimensions when I was rebuilding the t-case. The total travel before it (yoke) is out of the bushing, or bottoms on the inner bearing is 5". The yoke splines are 6 1/4" deep and the output shaft is 6 5/8" long from end to inner bearing. So I set my driveshaft length so that 3" was showing from the back of the yoke to the output housing. This gave me about equal travel in both directions. HTH

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a>
     
  3. SAVAGE1

    SAVAGE1 1/2 ton status

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    Thanks, That means I need to shorten my shaft about 2 inches. Anyone know much yoke is sticking out on a stock rig?

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

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    My custom made shaft was measured out and it has about an inch or inch and a half showing. Here is a pic <a target="_blank" href=http://community.webshots.com/photo/11399224/15691154yDTDHoEyGq>http://community.webshots.com/photo/11399224/15691154yDTDHoEyGq</a>
    I would think you would want a little more travel in the going out or getting longer direction. In reality I have a 6" lift with very little change in driveshaft length, but I haven't moved the tcase because it is a cv.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    &lt;a target="_blank" href=http://coloradok5.com/gallery/captcrunch&gt;http://coloradok5.com/gallery/captcrunch&lt;/a&gt;&lt;P ID="edit"&gt;&lt;FONT class="small"&gt;&lt;EM&gt;Edited by CaptCrunch on 11/21/01 03:25 AM.&lt;/EM&gt;&lt;/FONT&gt;&lt;/P&gt;<P ID="edit"><FONT class="small">Edited by CaptCrunch on 11/21/01 03:27 AM.</FONT></P>
     
  5. ftn96

    ftn96 1/2 ton status

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    YOu should have an 1-1/2 inches showing. SOme have gotten away with 3" showing. Every truck seems to react differently. But the stock amount is 1 1/2....

    If its too long, you can damage the output shaft as wwell as the slip yoke...aslo you will have problems with the rear seal leaking alot.

    If its to short, you have more of a chance for vibrations, excessive wear on the slip yoke spline.....and worst of all you take a chance on it coming off under a load and if this happens it can take out several things in its path.

    So "I" would recommend you stick with the 1-1/2 to 2 slip....

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  6. SAVAGE1

    SAVAGE1 1/2 ton status

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    Thanks for the pic Capt. When I measured for my driveshaft my Tcase was in its stock position. I got some vibration so I had to drop it an inch. Now its too long. Here's a pic:
    <a target="_blank" href=http://www.pirate4x4.com/forum/attachment.php?s=&amp;postid=139028>Slip Yoke</a>
    You guys think I'll have any problems with this bottoming out?

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  7. ftn96

    ftn96 1/2 ton status

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    Yep, I bet you will. I'd have that dog shortened for sure.

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  8. JIM88K5

    JIM88K5 1/2 ton status

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    I just orderd a CV shaft from Arizona Driveline today. I bet
    they could give you a good idea of how much.-Jim

    88 5.7 5in lift 35"procomp at's
    700-208-456-3in exh w/flowlowder 10 bolts & some ORD stuff
     

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