Rear end noise
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Rear end noise
My 2000 F150 4X4 has a little more than 48,000 miles. Recently I've noticed a quiet moaning sound coming from the rear differential. We've all heard it. You hear it when accelerating and it disappears when decelerating. In my truck it occurs at about 39 mph, is most noticeable around 41 mph, and disappears by 43 mph. You can hear it again at highway speeds, say around 70 mph. My problem is you ordinarily associate this with a well-worn vehicle, not one with less the 50,000 miles. I'm a city dweller so this truck has had a very easy life.
Last night I bought 6 pints of synthetic 75W140 and 8 ounces of friction modifier. (Almost $50. That stuff's expensive!) Did a complete drain and refill of the differential. The quiet moaning is still there though. Am I on the right track?
Last night I bought 6 pints of synthetic 75W140 and 8 ounces of friction modifier. (Almost $50. That stuff's expensive!) Did a complete drain and refill of the differential. The quiet moaning is still there though. Am I on the right track?
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You're probaby right. Well, I guess I'll just see if it starts to get worse. Wonder what happened? I went through high water once, but didn't see any water in the lub when I changed it out. The old lub was almost black though. What I put in was clear. Maybe it overheated somewhere along the line.
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I replaced a pinion gear once many years ago. It was a front differential on an '85 F-250 4X4. It was a plain differential as I recall, nothing fancy inside. I reused the old pinion bearings. I lucked out in that the new pinion had been manufactured to close enough tolerances that I could use the same spacers (shims) as the old one. It worked just fine. Of course, the front differential doesn't get used very much so how long it would have lasted in continuous service, I can't say.
I said I'd trade off this truck, but I know I'm not going to. If I have trouble I think I'll just set aside a couple of days and see if I can fix it. I'm sure there are a lot of motorheads posting here that can't stand taking their truck to a dealer even if their skills are kind of shakey. It's a personal thing.
I said I'd trade off this truck, but I know I'm not going to. If I have trouble I think I'll just set aside a couple of days and see if I can fix it. I'm sure there are a lot of motorheads posting here that can't stand taking their truck to a dealer even if their skills are kind of shakey. It's a personal thing.
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From: Southern USA
i know exactly what you mean. if you do this, i would be very careful to clean out all the old residue from the black oil such as very small metal particles from the worn out brg. get that pumkin clean as you can. this is the kind of thing that , if you took it to a dealer or shop, you don't know how well they will do the job, as you mentioned, it is kind of personal to myself also because i want to watch every thing they do. your' another face in the crowd and most mechanics are not going to treat it as if it was there own. i'm very particular and like yourself, would do it myself, esp. if youve torn into one of these at some point. there are a few other things we all could spend $900 on!! paul...p.s. i would check/inspect the carrier brgs very closely....if ANY doubt i would replace these to. you know very small metal pieces have been flying around in there. no one wants to do this job 2 times.......
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same problem here!
my 2003 has 36000 miles on it and its on its third pair of pinon gears already... and i have no confidence that it wont need a fourth. Mine have lasted about 3000 miles before the whine at 40mph starts and then ill wait a bit to take it in... so, *shrug* who knows... i know i cant afford to replace them 4 times a year like its needed since ive gotten it :P so i feel your pain
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From: Southern California.. Nea
My friend has a shop that does rear ends.. for $900 you should get a new ring and pinion gear set and all new bearings throughout your rear axle..
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From: Southern California.. Nea
Originally Posted by Metacarpels
my 2003 has 36000 miles on it and its on its third pair of pinon gears already... and i have no confidence that it wont need a fourth. Mine have lasted about 3000 miles before the whine at 40mph starts and then ill wait a bit to take it in... so, *shrug* who knows... i know i cant afford to replace them 4 times a year like its needed since ive gotten it :P so i feel your pain
I have driven nearly a million miles in Ford half ton trucks and never lost a rear end.. I have killed a couple of trannies though..
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Joined: Jul 2004
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From: TN
I took my 2003 Ford F150 SCrew, 3.55LS, into the Ford dealer a couple of weeks ago. The noise coming from the rear end was horrible around 35-55 mph. The Ford dealer's maintenance manager took it out for a test drive and it they decided it was bad enough to get fixed. They rebuilt the rear end and put on a new updated drive shaft. I've driven it now for a couple hundred miles and the noise seems to have gone away. Let's hope it stays this way. It seem that that is fixed, however, there seems to be some type of play/slippage when I come to a complete stop and on take-off. Something doesn't feel right. I will take it back to the dealer but does anybody have any idea what could be causing this?????
Your suggestions help greatly.
Mudslide
2003 Ford F150 Lariate SCrew, 3.55LS
Your suggestions help greatly.
Mudslide
2003 Ford F150 Lariate SCrew, 3.55LS
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