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Old Aug 18, 2011 | 08:57 AM
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2004 Expy Noise

Howdy everyone!

Hope you guys can steer me in the right direction.

I've had this noise in my truck for some time now, and can't quite seem to figure it out. On dry/hot days, when coming to a stop with the truck, I hear a clunk noise I suppose you can say. When that Happens, I feel a slight vibration under my feet. It happens lets say 3 out of 5 times or so. Recently now when at a complete stop and I start to take off, I hear a groan as the truck starts going, but only @ a complete stop. On rainy days, all the above noises are non-existent! No clunk no groan no nothing (the way it should be)!

I've had it looked at a few times by the ford dealership and a private mechanic and so far no dice. So far I've had:

Slip Yoke replaced and greased properly
Sway bar bushings replaced

Both mechanics have checked out the front end and everything is tight with no slop at all. This noise is driving me nuts! I'm hoping someone here has had the same or similar issue and can help me out!

I was thinking maybe dried up ball joins causing this?

Any help would be appreciated!
 
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Old Aug 18, 2011 | 10:23 AM
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2wd or 4wd?
How many miles since the tranny fluid/filter was changed?
 
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Old Aug 18, 2011 | 10:30 AM
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4wd and I did it about 8k miles ago or so. Everything was healthy while the pan was dropped
 
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Old Aug 18, 2011 | 01:49 PM
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Originally Posted by nagetech
4wd
In that case, I would suspect the front drive shaft or the front differential.
 
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Old Aug 18, 2011 | 01:51 PM
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Hum...never thought of that.... Totally changes what I was looking at myself....

What exactly should I be looking for ?
 
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Old Aug 18, 2011 | 02:18 PM
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Originally Posted by nagetech
Hum...never thought of that.... Totally changes what I was looking at myself....

What exactly should I be looking for ?
A worn front u-joint, lack of grease in the drive shaft slide, a bad bearing in the differential, a bad CV joint in a front half shafts.

This vibration under your foot is coming from the floor or the brake pedal?
 
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Old Aug 18, 2011 | 02:22 PM
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Foot...whatever is clunking down there causes a vibration that is felt on the floor!

Based on the possiblites that you listed, how would wet days silence them?
 
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Old Aug 18, 2011 | 02:25 PM
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Originally Posted by nagetech
how would wet days silence them?
Water is a temporary lubricant. Ever go down a pool slide or stand in a bathtub when it's dry versus when it's wet? Water can have the same lubricating effect on metal parts under a vehicle.
 
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Old Aug 18, 2011 | 02:25 PM
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Just to make sure I was clear on something..This problem happens in 2wd... Dont want you guys to think I meant it only happens when engaged in 4wd
 
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Old Aug 18, 2011 | 02:26 PM
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I would guess then the differential couldn't be a culprit..as that is sealed and water shouldn't get in there to "lubricate" anything right?
 
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