Vibration Issue - 38-45MPH

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Aug 22, 2019 | 10:22 AM

#16

frdf250

Thread Starter

Fleet Mechanic

Joined: Jun 2009

Posts: 1,866

Likes: 8

From: Fleetwood, PA

Yea i agree if it was a cheap check i would do it but it more than likely wont be....I guess ill start with u joints and hubs?

Oct 10, 2019 | 11:48 AM

#17

frdf250

Thread Starter

Fleet Mechanic

Joined: Jun 2009

Posts: 1,866

Likes: 8

From: Fleetwood, PA

New update with video

Items replaced to try and fix issue -

Tires
rear Driveshaft u-joints
all brakes and rotors
ball joints are new
front end steering is new except steering box
sway bar end links are new
Rebuilt the motor although not to fix the vibration i just wanted to do a refresh and needed to replace the rear main seal.......you know how it goes

Items replaced in addition to first post -

replaced rear u joint again along with carrier bearing
pulled a string line down the driveshaft to make sure it was straight as possible
had rear driveshaft balanced - no change
trans fluid
sonax shift kit was added

Tried a few things with no luck -

removed rear drive shaft went for a drive - still there
had tires rebalanced - even bought 2 new rims thinking it was them - still there

Check out this video - i was trying to see if i had a bad motor mount or trans mount. with the truck in reverse i had my fiance give it a little go peddle and it makes this noise?? it does not do it in “drive” only in reverse. could this be related?

Link to video -

Oct 16, 2019 | 05:20 PM

#18

frdf250

Thread Starter

Fleet Mechanic

Joined: Jun 2009

Posts: 1,866

Likes: 8

From: Fleetwood, PA

bump to the top...anyone?

Oct 16, 2019 | 11:17 PM

#19

'88 E-350

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Joined: Jul 2010

Posts: 1,753

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From: Los Angeles, Ca.

Put it up on jack stands, 4wd high, and run it to see if it does the vibration thing, also look at the wheels/tires to see if you have one with excessive runout. Early on it was speculated that because a trailer increases the vibration that it points to something in the front and I disagree. Total guess, I'm thinking a rear tire with excessive runout; whether caused by the tire, wheel, or hub.

Oct 16, 2019 | 11:21 PM

#20

'88 E-350

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Joined: Jul 2010

Posts: 1,753

Likes: 34

From: Los Angeles, Ca.

Did this start suddenly or slowly? If sudden, what preceded the vibration? Any repairs/parts replaced, accidents/hits of any kind, off roading trip, drunken drive...?

May 5, 2020 | 05:56 AM

#21

frdf250

Thread Starter

Fleet Mechanic

Joined: Jun 2009

Posts: 1,866

Likes: 8

From: Fleetwood, PA

Well after 2 new sets of tires, brand new rims and pulling the driveshaft for the 3rd time I think I found the issue. I went and got the tires shaved and the vibration is almost non existent. For $129 I would recommend anyone having this issue get their tires done. Took less than a day and I drove home loving my truck again.