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Slip Yoke Weeping AT Fuild

willyr1er

By willyr1er
in Engines & Drivetrain

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willyr1er Enthusiast

willyr1er

Posted
Posted

So I have a new problem that started about a week ago.  The transmission slip yoke is leaking from the small hole at the U-joint.  The rear seal is bone dry so I know that's good and not the issue.  From what I can find online, I have a bad O-ring in the tail shaft.

 

Anyone else ever has this issue and if so what was the corrective action?

 

My truck is also has 5" lift blocks in the back, not sure if maybe I don't have enough engagement for the slip yoke?  whats the best way to measure?

Nasty Senior Enthusiast

Nasty

Posted
Posted

I wouldn't want mine like that but I've seen worse 

willyr1er Enthusiast

willyr1er

Posted
  • Author
Posted

That's good to hear.  Any idea how long the yoke is with out pulling the driveshaft?

 

For now I just plugged the hole in the middle where it was leaking with some RTV, I dont know how this will effect the transmission but for now it has stopped the leak.  I found a few sites where other have done the same, some people said not to because it is a vent hole.

 

Hope the RTV keeps working until I can start to pull it apart looking for a bad O-ring.

willyr1er Enthusiast

willyr1er

Posted
  • Author
Posted

So far the RTV in the hole has held up and no leaks since.  Ive put on a good 500 miles on it.  I'll just ride it out until it starts up again.

00pooterSS Enthusiast

00pooterSS

Posted
Posted (edited)

I've replaced a few GM trans yokes for leaking. We just order a new one from GM and put them on is how we fix them. 

 

I'd use yours with the RTV for as long as it holds.

Edited by 00pooterSS
willyr1er Enthusiast

willyr1er

Posted
  • Author
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Good to hear, thanks!

 

I keep looking on my driveway every day for the leak to start again.

  • 7 months later...
King chuy New Member

King chuy

Posted
Posted

I’m having the same issue I lifted my truck 6.5 and I thought it was leaking from the seal but it leaking towards the end here is a picture. 

I need help I don’t know what is the correct way to fix this.

63894B87-08BE-4D3E-8816-EE7A6AACD36A.jpeg

300 Blackout Enthusiast

300 Blackout

Posted
Posted
I’m having the same issue I lifted my truck 6.5 and I thought it was leaking from the seal but it leaking towards the end here is a picture. 
I need help I don’t know what is the correct way to fix this.
63894B87-08BE-4D3E-8816-EE7A6AACD36A.thumb.jpeg.dc2a3a0a0f1c37b5bd3b06f27709c944.jpeg

You need a new driveshaft made to the correct length to accommodate your lift. The picture of your slip yoke shows a very dangerous condition that needs to be corrected.

I had one made to the correct length and this is how much of my slip yoke is exposed with all four wheels on the ground. 2e16cc72a4edd84e77648bdc8b90a40b.jpg
  • Like 1
  • 1 year later...
Allen Ash New Member

Allen Ash

Posted
Posted

How hard is it to replace the slip yoke? I have a 2016 GMC Yukon XL that just started leaking when parked on an incline where the rear of vehicle is lower (it doesn't leak when on level ground.) The dealer quoted me almost $500 to replace it which seems like a total rip off! They also recommended replacing the front joint as well. Any advice would be greatly appreciated!

swathdiver Senior Enthusiast

swathdiver

Posted
Posted
2 hours ago, Allen Ash said:

How hard is it to replace the slip yoke? I have a 2016 GMC Yukon XL that just started leaking when parked on an incline where the rear of vehicle is lower (it doesn't leak when on level ground.) The dealer quoted me almost $500 to replace it which seems like a total rip off! They also recommended replacing the front joint as well. Any advice would be greatly appreciated!

Slip yokes don't leak.  The slip yoke oil seal might.  3/4 of an hour labor rate for mine which should be the same as yours.

davester Senior Enthusiast

davester

Posted
Posted
56 minutes ago, swathdiver said:

Slip yokes don't leak.  The slip yoke oil seal might.  3/4 of an hour labor rate for mine which should be the same as yours.

While I don't know specifically about the yoke installed on the O.P.s truck, some slip yokes do leak.  At least some of them are machined with a through-hole, and with those ones, the plug used in the hole can leak.

  • Like 2
  • 11 months later...

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