Any transmission experts please
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 41
Likes: 0
From: St.louis Mo
Any transmission experts please
I have posted this question a few times and took everyones answers and tried each. I have a high pitched whine/humming coming from my car only when i hit the acceleractor i think i have narrowed it down to the transmission, or right under the shifter someplace not the rear end as expected. The whine only occurs when I hit the gas pedal and is higher pitched in 4th 5th and 6th gear. With this new info does anyone have any idea what it could be? Throwout bearing possibly?I changed rear end gear oil, that was not the problem. Transmission was flushed a month or so ago. the car only makes this noise driving and not in neutral if you rev it any guidance is appreciated.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
The noise is a bearing under load issue.
The noise that you are hearing is typically in the differential. When you accelerate it loads the bearing and when you let off the gas pedal it un-loads the pressure, thus the noise goes away.
Changing the fluid will not cure the problem.
The noise that you are hearing is typically in the differential. When you accelerate it loads the bearing and when you let off the gas pedal it un-loads the pressure, thus the noise goes away.
Changing the fluid will not cure the problem.
I have posted this question a few times and took everyones answers and tried each. I have a high pitched whine/humming coming from my car only when i hit the acceleractor i think i have narrowed it down to the transmission, or right under the shifter someplace not the rear end as expected. The whine only occurs when I hit the gas pedal and is higher pitched in 4th 5th and 6th gear. With this new info does anyone have any idea what it could be? Throwout bearing possibly?I changed rear end gear oil, that was not the problem. Transmission was flushed a month or so ago. the car only makes this noise driving and not in neutral if you rev it any guidance is appreciated.
Last edited by ajg1915; Dec 14, 2009 at 12:56 PM.
Racer
Joined: Sep 2004
Posts: 324
Likes: 2
From: Rogersville TN
I can't answer this as per the transaxle but many years ago I had a 56 Ford that did this. The cause was the pinion nut has backed off. However it would whine when you let up on the gas and stop when you got back on the gas.
Sounds like your pinion is moving in or out. One of the differential rebuilding sponser should be able to confirm this.
Sorry could be more help.
Sounds like your pinion is moving in or out. One of the differential rebuilding sponser should be able to confirm this.
Sorry could be more help.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Burning Brakes
Joined: Nov 2009
Posts: 773
Likes: 1
From: Okinawa
agree'd its in the diff...my origional diff did this...when i purchased my RPM diff they said my pinion nut was loose...the only one they'd ever seen be loose...you never know yours could have done that too
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