Drivetrain Clunk
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Mountain Pass
Joined: Jan 2018
Posts: 132
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Drivetrain Clunk
My 1996 F-250 has a clunk somewhere in the drivetrain. It’s only when you let off the gas, also if you are slowing down and you give it all little gas and let off there is a very noticeable clunk. It really feels like a bad u-joint, but i have put it in neutral and grabbed the drive shaft and can’t feel any play.
Mountain Pass
Joined: Sep 2009
Posts: 119
Likes: 5
I had an '87 with a 6.9 (came with a wife, so I didn't know its history) When I started driving it, I could have swore it had a bad motor mount. Good friend, retired mechanic, did a lot of work on F250 diesels, said it could be the dual mass flywheel, and he was probably right, as I never found anything that could cause it, and the wife and truck left before I had to do something with it.
Don't know if a '96 has the dual mass.
Don't know if a '96 has the dual mass.
i ain't rite
Joined: Mar 2005
Posts: 65,585
Likes: 5,613
From: Marlboro Mental Hospital.
you can have a bad universal and not feel or see it.
the only way to really tell if a universal is bad is to drop the drive shaft and inspect the needle bearings inside the cups.
the only way to really tell if a universal is bad is to drop the drive shaft and inspect the needle bearings inside the cups.
i ain't rite
Joined: Mar 2005
Posts: 65,585
Likes: 5,613
From: Marlboro Mental Hospital.
99% of the time it is the rear u joint. but like said above, check the rear differential too. a lot of times the pinion bearings will get a little loose and cause a clunk when put in gear/brakes applied.
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