Slip Yoke clunking
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4th Gear
Joined: Feb 2018
Posts: 4
Likes: 5
Slip Yoke clunking
I know there are other threads with this issue but I'm not sure all the "Clunking" noises people are describing are the same. I took a video today of the clunking my truck was making and found it to be the slip yoke. It clunks when stopping and when accelerating from the stop. It may be doing this while driving as well but i don't notice it. Any mechanics have a fix for this? Is this a simple take apart and grease job or am i looking at a more serious issue?
2019 F250 6.2L Gas
2019 F250 6.2L Gas
Cargo Master
Joined: Feb 2017
Posts: 2,415
Likes: 718
From: Wisconsin
Greasing it won't do a thing other than make a mess, (it is designed to get all the lube it needs from the atf, if your referring to the slip shaft ). I would check for severe axle wrap, caused by a loose axle u-bolt, missing leaf spring, motor/trans. mounts, etc. Looks very severe in my opinion.
Trailering
Joined: Dec 2018
Posts: 17
Likes: 2
From: Racine, Wisconsin
How did you grease the slip joint? Can you just remove the driveshaft, then pull the yoke out? Will trans fluid come pouring out? My truck is definitely clunking like yours.
Laughing Gas
Joined: Mar 2008
Posts: 1,031
Likes: 510
Drop the driveshaft from the rear and pull. Put a pan under the tailshaft to collect any fluid that might drain out.
Ford even sells a slip joint grease if you want to stay OEM.
Ford even sells a slip joint grease if you want to stay OEM.
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Trailering
Joined: Dec 2018
Posts: 17
Likes: 2
From: Racine, Wisconsin
I was experiencing the same clunking issue. The output shaft seal also starting leaking, so I went to Ford and bought the seal. Greasing the splines and replacing that seal were super easy and it fixed my clunking issue! I just used some high moly engine assembly grease I had on the shelf. The splines looked good and had ATF in them - not good enough apparently.
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