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snkr32
Novice

Jan 15, 2010, 5:46 PM

Post #1 of 6 (2255 views)
vibration Sign In

hi i have an 2002 explorer and have a wicked vib. tires ok universals jouints ok. anyone guess at the problem. any help greatly app.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jan 15, 2010, 6:04 PM

Post #2 of 6 (2247 views)
Re: 2002 Explorer vibration Sign In

Is it better or worse with acceleration, cornering - just a certain speed and how did you check U-joints? When a U-joint first fails it doesn't necessarily show looseness - you have to remove the shaft(s) to really know but usually better or worse with acceleration or deceleration at first,

T



Sidom
Veteran / Moderator
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Jan 15, 2010, 9:00 PM

Post #3 of 6 (2237 views)
Re: vibration Sign In

We're going to need to know at what speeds & conditions the vibration is happening at to even venture a guess...........


snkr32
Novice

Jan 16, 2010, 5:11 AM

Post #4 of 6 (2235 views)
Re: 2002 Explorer vibration Sign In

at 40 km it starts.at 80 km its worse.and i just grabbed the driveshaft and tried to move it.seemto be solid


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jan 16, 2010, 5:52 AM

Post #5 of 6 (2233 views)
Re: 2002 Explorer vibration Sign In

See if this pic shows........



It's not enough to just check for visual looseness. In pic above you can see where needle bearings have indented the X of the joint. Under load it tries to cross those lumps and can vibrate. If off vehicle the joints should freely/smoothly just drop in both directions
which is impossible to do in place.

Again - when one binds up it will usually be better or worse with loads and then it's suspect. You might visually see some rust staining which is also a clue. Many are tight before they show play which means it's really gone.

Index shaft to attaching area when removing a shaft so you can replace it in same position. You have the symptoms and I don't know of anything other way to verify the real condition without removing to check,

T



nickwarner
Veteran / Moderator
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Jan 18, 2010, 9:42 AM

Post #6 of 6 (2218 views)
Re: vibration Sign In

your driveshaft could have an imbalance. They shaft is balanced at the factory by welding on weights as needed. Look to see if there is a spot where on used to be and has been broken off. If so, contact a driveshaft company and get it rebalanced






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