Transmission 727.904 high whinding noise

joseph p. · Jul 16, 2016

Hello to all.i was driving to my friends house a couple of miles away.i got on freeway and the car started making a high whinding noise like a semi truck changing gears.tranny is nice and pink.full level on dip stick.it was running fine with the high whind when accelerateing.gears were shifting.can i get some help on diagnosing this matter.thanks so much.

HEMI-ITIS · Jul 16, 2016

Need to narrow the diagognostic process down.Was it trans,rear gear or tire noise???????
Can you record while driving and post it,,,,maybe you tube?

RT K_line · Jul 16, 2016

Also does it change when you accelerate or let off the gas. Also You can manually shift the transmission thru the gears to see if it changes tone in any particular gear.

joseph p. · Jul 16, 2016

Its a high whinding. Noise.like a semi truck changing gears.coming from the motor or trans.but it still changes gears. .it sounds like when you first start a cold engine.

joseph p. · Jul 16, 2016

When i let off the gas accelerator it stops the noise.when i go slow like 10mph it doesnt make noise.i havent tried to change gears. Im at work.keep t coming.i appreciate The advice trans fluid is good anf full pink.

joseph p. · Jul 16, 2016

hey guys, latest update its not coming from the tranny its coming from the motor.someone told me maybe its the vacum from the carb,its a 4 barrel carter,because i noticed it sounded the same way as if you are cold starting the motor in the morning, and then when you hit the gas pedal the motor kicks down, so i will trouble shoot from the car.any suggestions are appreciated thanks so much.

HEMI-ITIS · Jul 16, 2016

Try to find the leak by ear.If that doesn't work,carb cleaner used with short shots by the carb{S} intake and brake booster if you use one.A stethoscope is a hany tool in my box.

AR67GTX · Jul 16, 2016

Is it more of a whistle than a whine? I used a single hole base carb gasket under my Edelbrock carb once (instead of a 4-hole gasket) and it whistled. When I replaced it with a 4-holer it went away.

joseph p. · Jul 16, 2016

AR67GTX said:
Is it more of a whistle than a whine? I used a single hole base carb gasket under my Edelbrock carb once (instead of a 4-hole gasket) and it whistled. When I replaced it with a 4-holer it went away.

++it sounds like a vacum cleaner ,like a diesel truck in first gear, it goes away for a minute,then i hear it again,,

AR67GTX said:
Is it more of a whistle than a whine? I used a single hole base carb gasket under my Edelbrock carb once (instead of a 4-hole gasket) and it whistled. When I replaced it with a 4-holer it went away.

HEMI-ITIS · Jul 16, 2016

A wedge with a tray is a PIA to find without removng the intake.Unless you have a smoke machine.
I also highly recommend SUPERPERFORMACE gaskets.Best I have ever used!! :thumbsup:

joseph p. · Jul 16, 2016

another words, the sound is just like starting up a cold v 8 engine in the morning

joseph p. · Jul 16, 2016

update,,i dont know if its the problem,but there is a bolt on the torque converter that is backed out 1/4 inch.if its not the problem i am glad it will be tightened.

joseph p. · Jul 17, 2016

First of all I wanted to tell the wonderful people on. B bodies only that i really appreciate the valuable info that I needed , because it is really excellent top notch info, and members.i found the problem its a failing brake booster I did the brake. Booster tests and it failed.but i still drove it around the block a few times and it didn't make the hydraulic sound ,which was the Brake booster,i wish I could buy a round of drinks at the bar,wow imagine how much info would be discussed,lol,thanks again to all,until next time ,cheers.

Transmission 727.904 high whinding noise

joseph p.

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HEMI-ITIS

STREETER on LI

RT K_line

Well-Known Member

joseph p.

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joseph p.

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joseph p.

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HEMI-ITIS

STREETER on LI

AR67GTX

FBBO Gold Member

joseph p.

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HEMI-ITIS

STREETER on LI

joseph p.

Well-Known Member

joseph p.

Well-Known Member

joseph p.

Well-Known Member

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