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Humming Noise from rear of truck
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John Wayne
Novice
Sep 11, 2012, 11:26 AM
Post #1 of 14
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Humming Noise from rear of truck
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Hi, I have a 2001 Nissan Frontier SE Pick-Up. 4 cyl. 5 speed manual. 102,000 miles. I have taken good care of this truck and it has taken good care of me. Recently there has been a HUMMING NOISE coming from the rear of the truck. The noise is only in higher gears and higher RPM. If you put in the clutch while at high speed the noise goes away, so I do not feel that it's the tires making the noise. But that's the type of humming sound I'm talking about. It sounds like the tires are humming but that's not it. I need to drive 400 miles to Kentucky Lake to pick up my boat and I would like to elimiate this noise before traveling. Any help would be appreciated.
Thanks JWK
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 11, 2012, 12:48 PM
Post #2 of 14
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Re: Humming Noise from rear of truck
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Does backing off the throttle have the same effect as pushing the clutch in?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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John Wayne
Novice
Sep 12, 2012, 7:14 AM
Post #3 of 14
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Re: Humming Noise from rear of truck
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There is little or no noise at lower speeds and lower RPM. Backing off the throttle eliminates the sound. The noise is mainly in 4th or 5th gear. It really sounds like it's coming from the rear end unit.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 12, 2012, 8:14 AM
Post #4 of 14
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Re: Humming Noise from rear of truck
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Could be rear bearing in the transmission or pinion bearing in the differential. It needs to be run on a lift to pinpoint the problem. It going to be a rebuild of one or the other though.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Sep 12, 2012, 8:38 AM
Post #5 of 14
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Re: Humming Noise from rear of truck
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Another suggestion is to check the universal joints on the drive shaft. If it has a two piece drive shaft, inspect the center support bearing too. You'll have to remove the drive shaft to check if you have binding U joints.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Sep 12, 2012, 8:39 AM)
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Hammer Time
Ultimate Carjunky
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Sep 12, 2012, 9:32 AM
Post #6 of 14
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Re: Humming Noise from rear of truck
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They do go bad but i don't believe it would respond to on and off throttle that way.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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John Wayne
Novice
Sep 13, 2012, 6:49 AM
Post #7 of 14
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Re: Humming Noise from rear of truck
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Thank you for the help. I will follow up with you when the problem is resolved. Thanks JWK
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John Wayne
Novice
Sep 22, 2012, 6:28 AM
Post #8 of 14
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Re: Humming Noise from rear of truck
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I took the truck to a local truck professional. After a test drive we discovered the sound is mainly in 3rd and 5th gear. So it looks like the trans need work. A rebuild kit is going to be $1500+ and then you might as well put in a new clutch while everything is apart, so we are getting up into the $3000 range and that truck is just not worth that kind of investment. It's all back together and running and humming and I'll just drive it till it dies.
Thanks for the advice JWK
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Discretesignals
Ultimate Carjunky
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Sep 22, 2012, 8:27 AM
Post #9 of 14
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Re: Humming Noise from rear of truck
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Instead of rebuilding the transmission have you looked into replacing it with a good used transmission? Most salvage yards offer a warranty, but you'll have to ask.
Clutch kit install
R&R transmission 4.0 hrs
Machine flywheel ~$40
Clutch kit ~$170
Used manual transmission ~$900
If shop labor rate was $100 an hour, the approximate cost to repair the problem: $1510
Doesn't include misc parts and tax
The thing about noises in a manual transmission is that you shouldn't ignore it. If certain transmission internal components seize or break, that could lock up the rear tires. You really don't want that happening at highway speeds.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Sep 22, 2012, 8:34 AM)
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John Wayne
Novice
Sep 24, 2012, 8:03 AM
Post #10 of 14
(3078 views)
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Re: Humming Noise from rear of truck
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I have a car, so repairing or replacing the trans is on hold for a while. I would have no problem with a used tranny from a bone yard. However I was planning on driving it the way it is for about a thousand miles round trip to pick up my little 14' boat ( it weighs nothing) and visit some friends in Kentucky & Tennessee. But now your scaring the crap out me driving the thing that far without repairs. I need to go get that boat out of storage so I think I'll just stay off the Interstate and take my time driving the red routes.
Thanks JWK
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Hammer Time
Ultimate Carjunky
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Sep 24, 2012, 8:06 AM
Post #11 of 14
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Re: Humming Noise from rear of truck
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I would never head out on a trip in that condition.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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John Wayne
Novice
Sep 24, 2012, 8:17 AM
Post #12 of 14
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Re: Humming Noise from rear of truck
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OK, looks like I will give my Brother the car and borrow his truck for the trip. Just hope he can avoid crashing my new Accord while he uses it.
thanks again JWK
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John Wayne
Novice
Sep 24, 2012, 1:57 PM
Post #13 of 14
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Re: Humming Noise from rear of truck
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In the Chicago area a used manual 5 speed transmission runs from $1200 to $1800. Perhaps it would be better to get the existing trans rebuilt. Several people have told me to forget it and buy something else but that's not an afforadable option at this time. Makes no sense to just leave the truck in the driveway but at this time I just do not know what to do with it.
Thanks JWK
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 24, 2012, 2:00 PM
Post #14 of 14
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Re: Humming Noise from rear of truck
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The more you drive it, the more the rebuild is going to cost.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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