clunking? help!
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New User
Joined: Nov 2006
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clunking? help!
I have a 95 F-150 4x4. About a week ago I noticed that when i came to a complete stop, it made a clunk noise and gave a little jerk when i started to go again (i would actually move about an inch forward before it made the noise). It was only when i came to a complete stop though. Today on my way home i noticed that when i idle ahead from a stop, without pressing on the gas at all, it makes the same noise only softer and it seems like it is at the same pace as the turn of the wheels. Could this be the knuckles in my hubs going out? I have the automatic locking hubs on my truck. Any help is appreciated!!
Senior User
Joined: Sep 2004
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From: SC lowcountry
Sounds like a u joint somewhere. Get under and try to wiggle each one - does it occur the same in 4 and 2 WD modes??
I believe the auto hubs only engage when in 4WD but I am no expert on them.
I believe the auto hubs only engage when in 4WD but I am no expert on them.
Senior User
Joined: Aug 2004
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From: S.E. Michigan
I've got a 92", F-150 4X4 that does it too (in 2wd). I think it's clutch's in the limited slip rear thats doing it. Was told a long time ago (1968) from Ford not to worry about it, I haven't since. Seems like all posi(s) do it to some degree, at least for me they do, just not all the time. My 2 cts.
Elder User
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My had same issue. Ujoints are in good shape and no play. Found there was some up and down play in the shaft going into the differential. Over time it got worse. Finally got to where if I took off quickly, it felt and sounded like I was hit in the rear end by another car. Tried tighening up the nut on the shaft, but didn't help. Replaced the front pinion carrier bearing and the seal. Clunking is gone for now.
Good luck Frank
Good luck Frank
Mountain Pass
Joined: Aug 2005
Posts: 211
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From: Newark, Ohio
I have a simular issue and know mine is due to radius arm bushings being worn out. It is a flex/play issue when I accelerate from a stop and then the acceleration causes the play in in the bushings to slam.
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Elder User
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The rear ujoint bolts to a yoke that is attached to the pinion carrier shaft, which is inside the differential housing. There is an inner and outter bearing that supports the shaft. Pushing up and pulling down on the ujoint right at the end of the driveshaft gave no play in the ujoint, but excessive movement in the yoke. The outer one is not bad to replace, but there is a proceedure to follow to do it corectly.
The thump I got when starting out was definately in the rear of the truck.
Good luck Frank
The thump I got when starting out was definately in the rear of the truck.
Good luck Frank
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Freshman User
Joined: Aug 2006
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From: MInnesota
clunk
sounds like the center bolts of your leaf springs. I had that problem. Took the u bolts holding the leafs off the rear end and the head of the center bolt was worn. The u bolts must have been loose. I wore out the hole the center bolt sitts in too.
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New User
Joined: Nov 2006
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Weelll, the softer clunks, i have discovered, are due to a bad motor mount. There is still the major one that i have yet to figure out. It sounds like it's coming from right under the drivers seat? (i know that sound can travel alot under there though) It seems like more of a binding noise than anything, almost as if the 4WD is trying to engage but then slips back out?? i'm not sure if it's a major thing or not, but it is getting very annoying
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
Try putting the rear end up on jack stands. Leave the trans in neutral, engine off, and crawl under the truck. Twist the driveshaft by hand to see where the sound is coming from while you are under the truck. Clunking could be from the transmission or the rear end so you have to pin point to get an idea where to begin.
Elder User
Joined: Nov 2005
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If anyone gets a clunk under the seat when you turn into a driveway or any similar situation, you should read this article. Real easy fix that really works.
http://www.troublecodes.net/articles...d_trucks.shtml
http://www.troublecodes.net/articles...d_trucks.shtml
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