Strange vibration

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Jun 10, 2008 | 04:16 AM

JaySVX

Thread Starter

Fleet Mechanic

Joined: Feb 2008

Posts: 1,955

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From: Eastern PA

Strange vibration

My expedition has a strange vibration, when going around turns, at low speeds. It's a dull sound, not a clicky like one might expect from a CV joint. I was thinking it might be the u-joint in the drive shaft. It only happens after the vehicle has warmed up. It seems to be coming from the center of the truck, though it's difficult to determine. I'm not sure why it only happens around bends, either. If anyone has any ideas it would be greatly appreciated. Thanks.

1998 Ford Expedition EB 4x4 5.4litre v8

Jun 10, 2008 | 10:07 AM

alloro

Fleet Owner

Joined: Apr 2008

Posts: 24,316

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From: 0,0,1

When is the last time the rearend fluid was changed?

Jun 10, 2008 | 10:17 AM

JaySVX

Thread Starter

Fleet Mechanic

Joined: Feb 2008

Posts: 1,955

Likes: 6

From: Eastern PA

as far as i know, never. if that might be it,i'll do it tonight. that vibration makes me nervous.

Jun 10, 2008 | 10:55 AM

alloro

Fleet Owner

Joined: Apr 2008

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From: 0,0,1

Make sure you also add friction modifier when you put in the new fluid.

Jun 10, 2008 | 11:08 AM

kaboom10

Elder User

Joined: Dec 2007

Posts: 842

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From: royal oak, mich

Change it out with Royal Purple. It has the modifier in it already and gives superior lubrication.

Jun 11, 2008 | 05:56 PM

Rentaltux

New User

Joined: Mar 2007

Posts: 15

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Quote:

Originally Posted by kaboom10

Change it out with Royal Purple. It has the modifier in it already and gives superior lubrication.

Mine was doing the same thing. I changed the fluid to Royal Purple and it went away, although it took a couple days of driving after the change. None the less it is all better.

R