clunk noise
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Senior User
Joined: Aug 2005
Posts: 123
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clunk noise
Howdy,
I have a 2002 F-250 4X4 Super Duty. When I slowly accelerate from a full stop I hear something thump in the drive train or something else, it's pretty heavy, the truck only has 30K miles. Anyone esle experience this? Any ideas what to check? it's got to be in the drive train somewhere.
Thanks.
I have a 2002 F-250 4X4 Super Duty. When I slowly accelerate from a full stop I hear something thump in the drive train or something else, it's pretty heavy, the truck only has 30K miles. Anyone esle experience this? Any ideas what to check? it's got to be in the drive train somewhere.
Thanks.
Lead Driver
Joined: Jul 2005
Posts: 5,967
Likes: 7
From: Eccles, WV
The noise that you are more than likely hearing is the rear driveshaft binding on the outout shaft of the transmission or transfer case. This is a known Ford problem. They have had it for years. Still cannot figure out why Ford does not put a grease fitting somewhere to make the repair simple.
The cure is to remove the drive shaft and lubricate the splines inside the tube with a good waterproof silcone grease. Sooner or later the clunk will come back. Also to soften the blow, put a shock bushing in the end of the shaft housing.
The cure is to remove the drive shaft and lubricate the splines inside the tube with a good waterproof silcone grease. Sooner or later the clunk will come back. Also to soften the blow, put a shock bushing in the end of the shaft housing.
Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
Lube the slip yoke on the rear driveshaft like pmasley advised and your problem will more than likely be solved. Make sure you clean it real good first as some types of grease aren't compatable with others. Do a search on this site and you'll find a ton of posts on it.
Good luck,
Austin
Good luck,
Austin
Lead Driver
Joined: Jul 2005
Posts: 5,967
Likes: 7
From: Eccles, WV
The bushing I am talking about is the black bushings between the shock absorober mounts. Just drop one into the end of the shaft before sliding it back in the tranny or transfer case. It will abosrb some of the impact. Keeps from tearing our the rear seal.
88, you probally have the same problem. Look at the output shaft for wear. If you let this go on for quite some time, it will wear the slip joint and the tail shaft out. Very expensive repairs will follow.
Hey Big Orn: Where did you put the grease fitting?
88, you probally have the same problem. Look at the output shaft for wear. If you let this go on for quite some time, it will wear the slip joint and the tail shaft out. Very expensive repairs will follow.
Hey Big Orn: Where did you put the grease fitting?
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Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
Originally Posted by pmasley
Hey Big Orn: Where did you put the grease fitting?
I haven't done it yet....procrastination took over...
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Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
Originally Posted by pmasley
How do you get it there with the U-Joint in the way?
Before removing the boot, mark the area you want the fitting so that it will not interfere with the boot whatsoever. Yes, this will put the hole into a splined area, but that much metal removed won't hurt a thing and it makes it so much easier to grease - only a shot or two after initial load will be fine.
If you keep your trucks for years like I do, then you will at some point need to re-lube that yoke from time to time.
Powerstroke Doctor
Joined: Aug 2002
Posts: 474
Likes: 0
From: Loxahatchee, FL
I went to lube my driveshaft last night but no such luck. You guys kee[ talking about the slip yoke at the output shaft of the transfer case but I do not have one there. I have 4 12mm 12pt bolts that bolt up to the shaft that come out of the transfer case. The shaft that comes out of the transfer case has a big nut, so it is not a slip yoke. Are you guys talking about the slip yoke between the 2 rear driveshafts by any chance?
