Rear end whine

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Dec 13, 2006 | 10:52 AM

Warhawk1963

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Rear end whine

Hi folks,
Gotta an 04 F150 S/C FX4. Seem to be getting a kinda high-pitched whining
sound coming from the back(no not the wife!) under slight acceleration at
around 45-50 mph then goes away around 60. Not super loud but enough to
hear with the windows up. Dealer of course road-
tested and can't hear it. Thought maybe its the rear-end or u-joint. There is
a TSB out for something in these diffs but not sure if related. Any help greatly
appreciated. Cheers.
Adam

Dec 13, 2006 | 10:58 AM

RVDave

5th Wheeling

Joined: Oct 2006

Posts: 40

Likes: 2

From: East central IL

Use the TSB button at the top of this page. I did and found two TSB's on the diff or my truck.

Dec 13, 2006 | 11:00 AM

Warhawk1963

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To RV Dave,
Any luck getting those TSB's done?
Adam

Dec 13, 2006 | 12:37 PM

jdwheels

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Joined: Nov 2004

Posts: 184

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From: Omaha NE

I had the rear end done 4 times, finally they got it right. I think the dealer just got tired of me coming back, so they spent the time to do it right this last time. Just like new now 5,000 miles after the work was done.

Dec 13, 2006 | 03:14 PM

osbornk

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From: Marion, VA

Quote:

Originally Posted by Warhawk1963

I had exactly the same problem and the dealer told me it would do no good to call Ford. I didn't, I wrote them and got a positive response in two weeks but no action. Wrote them again with the same results and then again. After the 4th letter (with copies of all previous ones and a log of who I talked with and when and what the discussion was), I got a call for a manager. He sent me to another dealership who corrected the problem after the three failed attempts at the first dealership. They had left the carrier bolts loose and it wore the housing resulting in the replacement of the assembly. Had they listened to me months earlier, they could have saved the cost of the housing. The secret is persistance and good records. They should have known better than to mess with a retired old F**t who has time to irritate everyone and enjoys it.

Last edited by osbornk; Dec 13, 2006 at 03:16 PM.

Dec 13, 2006 | 04:56 PM

gcozmo

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Joined: Mar 2004

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From: Roanoke

You know that the Explorer's have basically the same problem. I have an 04 with the LS 373 rear and it started whining with about 10K miles on the clock. I let it go until just recently because I had read a lot of posts about how Ford was changing the rears with new ones from Ford and that wasn't fixing the problem. Then the individual Ford dealers started rebuilding them on site and were having good success. I took mine in and so far it has been very good. We had the whine when the speed was between 50 and 62 and then it would get quieter but not completely gone. I am not sure if this is the same problem as yours but it may help. If it is still under warranty maybe you can get them to rebuild it. Greg

Dec 14, 2006 | 08:57 AM

KevinM

Posting Guru

Joined: Jul 2004

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Here is the TSB

10 Ugly Ford Trucks That We Still Kinda Love

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10 Things Every Truck Owner NEEDS (2026 Edition)

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Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

Dec 16, 2006 | 09:23 AM

osbornk

Postmaster

Joined: Nov 2004

Posts: 2,511

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From: Marion, VA

I wouldn't worry about it if I were you. A friend of mine has listened to his whine for over 300,000 miles. If you had an older Ford truck or several of the other brands, other noises would drown out the whine and you would never know it. If it does go bad, you won't do it any additional harm. A friend of mine had to get a replacement last year (05 3.73 LS 9 3/4 gear) due to an accident and I think he bought a used assembly for around $600.

Dec 16, 2006 | 10:29 PM

#10

4DOORSR

Senior User

Joined: Jul 2006

Posts: 425

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From: Ottawa, Canada

Depending which bearing is gone prices can vary. My old blazer had an axle bearing go bad and I left it so long it got chewed up inside and messed up the pinion bearing.I ended up having to replace them all. Remember friction=heat. Heat=bad. Get it fixed sooner than later IMO.