High Pitched Whine
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Junior User
Joined: Apr 2006
Posts: 84
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From: Richardson, TX
High Pitched Whine
I notice a high pitched sound during acceleration to maintain speed, stops immediately when I take my foot off the gas pedal. I’ve got an ’04 F150, 2 WD w/ tow package. The truck has always made this sound. It’s not excessively loud, you really have to listen in order to hear it.
I’m assuming it’s the limited slip rear axle differential and (hoping) that it’s normal. Or do I need to have it examined?
I’m assuming it’s the limited slip rear axle differential and (hoping) that it’s normal. Or do I need to have it examined?
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Junior User
Joined: Apr 2006
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From: Richardson, TX
I’ve never heard what a worn out differential sounds like, but what I’m hearing is about what I’d imagine it would sound like. Although it’s not very loud, I noticed it right after I bought the truck new. It’s been two years and 20,000, hasn’t got any louder, but it’s there so I guess I’d better have it checked out.
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Joined: Jan 2004
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From: Murray
My guess,
Vacum leak, maybye from a loose fitting like power steering or even brake power booster.
-Chris
Vacum leak, maybye from a loose fitting like power steering or even brake power booster.
-Chris
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Joined: Apr 2005
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Bring it in under warranty. It could be the ring and pinion. Ford had issues with the rear diffs mostly with the larger 9 3/4 limited slip units. Eventually it will get louder and it could get real expensive if its no longer under warranty.
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From: NORCAL
Mine did the same thing, I still cannot pin it down. It happens uphill while accelerating, as soon as I let off the gas it stops. I cannot tell if it's the rear end, tranny or motor. My wife hangs her head out the window to listen but shes not very good at identifying where the noise is from, it's sorta like a whistle coming from the right side and I can't remember if it's in a certain gear or not. I've taken it to the dealer but there are no hills in the dealer parking lot to test it.
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Junior User
Joined: Apr 2006
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From: Richardson, TX
I notice mine more while cruising at speed, on level ground 60-70 mph. I'm thinking differential because it's only during acceleration. The Michelins on my truck actually make twice as much noise as the whine I'm hearing. You have to listen very closely, then it's like you said "as soon as I let off the gas it stops", tap the acccelerator and I hear it again. I'm goiong to take it to Ford, hopefully they'll make an accurate analysis. I also have rear brake rotor issues, rotors are grooving excessively on the outer surface only, inner surface is smooth.
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Joined: Jun 2004
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had the same problem and the dealer warrantied it. it is all fixed. let me pull out my service invoice and i will tell you exactly what they did. both the wining at highway speed that went away when i got off the gas, and the rear end chatter around a corner
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Junior User
Joined: Apr 2006
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From: Richardson, TX
Originally Posted by liquidc11
TSB 05-23-03 bad pinion, ring, and bearings.
was the whinning noise
it is all good now
was the whinning noise
it is all good now