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Higher pitch hum when accelerating?

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Old Apr 20, 2016 | 09:38 AM
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Higher pitch hum when accelerating?
When I accelerate, I notice a higher pitch hum. Is it a vacuum problem with the tranny? Is it normal?
 
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Old Apr 20, 2016 | 12:22 PM
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Tires? Wheel bearing? Drive shaft u joint? P/S pump? Do you only hear it or can you feel it in the trans hump?
 
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Old Apr 20, 2016 | 06:09 PM
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Does it change with how hard you accelerate?
 
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Old Apr 21, 2016 | 10:00 AM
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Originally Posted by 77&79F250
Tires? Wheel bearing? Drive shaft u joint? P/S pump? Do you only hear it or can you feel it in the trans hump?
It may be the power steering pump. I notice a lower hum and some other noise when I either turn all the way to the right or all the way to the left.

I know the reservoir is a little low. Do you know what kind a power steering fluid I need?
 
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Old Apr 21, 2016 | 10:01 AM
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Originally Posted by mountain dewd
Does it change with how hard you accelerate?
Yeah, it increases in pitch until the tranny shifts.
 
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Old Apr 21, 2016 | 10:22 AM
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From: O-O-O-Oreilly's
Originally Posted by Planejet42
It may be the power steering pump. I notice a lower hum and some other noise when I either turn all the way to the right or all the way to the left.

I know the reservoir is a little low. Do you know what kind a power steering fluid I need?
I use type F ATF in mine.
 
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Old Apr 21, 2016 | 10:59 AM
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Originally Posted by Planejet42
It may be the power steering pump. I notice a lower hum and some other noise when I either turn all the way to the right or all the way to the left. I know the reservoir is a little low. Do you know what kind a power steering fluid I need?
Type f transmission fluid.

You really need to go a local parts store and get a cheap Chilton or Hanes Ford truck repair manual. That will get you going in the right direction as far a learning basic things and general maintenance. It also has lots of pictures and that is what I use. lol Or you can even go to the local library to look at the actual paper book before you buy it. Remember those things before the internet and Kindle?

List: Repair Manual - General - 1979 Ford F-250 | O'Reilly Auto Parts

Do It Yourself (DIY) Auto Service Repair Manuals from Haynes

Also order a bunch of free 73-79 truck parts catalogs to lean item names, make it easier come time to go to the parts store. LMC, Jeffs Bronco Graveyard (78/79 Bronco's are the same front end and lots of interior parts), Macs, Dennis Carpenter, National Parts Depot ect...
 
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Old Aug 2, 2016 | 05:35 PM
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I'm having the same problem plus I can feel vibration in the gas peddle it starts making the noise when it builds up boost between 5-15 psi
Please help
 
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Old Aug 2, 2016 | 05:37 PM
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Originally Posted by Planejet42
When I accelerate, I notice a higher pitch hum. Is it a vacuum problem with the tranny? Is it normal?
Did you ever find out what the problem was??
 
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