Drivetrain Whirling/tapping under passenger floorboard

H

Hybrid707

Member

Feb 26, 2020

40

3

18

California

Oct 9, 2021

#1

• Oct 9, 2021

• #1

Hello, I have a 95 5.0 that I recently swapped the transmission in. Transmission shifts like butter with and without using clutch but there is a metallic whirling/tapping coming from under the passenger floorboard. The noise is not audible at idle or if revved and does not change if the clutch pedal is pressed or not, seems to only make noise when the car is moving or on decel. Today while coasting in neutral I turned the car off and the whirling/tapping was very audible since the motor was off which leads me to think it’s not the transmission or pp/fw set up. Anyone have any suggestions on things to check before I drop the tranny ?

 

KRUISR

10 Year Member

Apr 16, 2015

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Oct 9, 2021

#2

• Oct 9, 2021

• #2

Is driveshaft rubbing on something? If you look at it you would see some rub marks of any contact.

 

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H

Hybrid707

Member

Feb 26, 2020

40

3

18

California

Oct 9, 2021

#3

• Oct 9, 2021

• #3

KRUISR said:

Is driveshaft rubbing on something? If you look at it you would see some rub marks of any contact.

Click to expand...

I’ll double check when I’m off work, last time I had the car up it didn’t show any signs of rubbing. So weird

 

H

Hybrid707

Member

Feb 26, 2020

40

3

18

California

Oct 12, 2021

#4

• Oct 12, 2021

• #4

Bump, the only way to get the metal tapping (sounds like someone hitting a fence pole with a screwdriver) to go away while coasting is to push the shifter slightly against a gate for a gear with the clutch in. Other than that brakes, pedal and rpm do not affect the noise

 

H

Hybrid707

Member

Feb 26, 2020

40

3

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California

Oct 12, 2021

#5

• Oct 12, 2021

• #5

.

 

H

Hybrid707

Member

Feb 26, 2020

40

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California

Oct 12, 2021

#6

• Oct 12, 2021

• #6

View: https://youtube.com/shorts/oPZc_TGddao?feature=share


Here’s a video of the sound for reference and how pushing it against a gate stops it

 

KRUISR

10 Year Member

Apr 16, 2015

1,812

920

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Oct 12, 2021

#7

• Oct 12, 2021

• #7

So for clarity, in the video you were stopped in neutral and turned off the engine and the noise/rattle decreased in frequency after engine off?

 

H

Hybrid707

Member

Feb 26, 2020

40

3

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California

Oct 12, 2021

#8

• Oct 12, 2021

• #8

KRUISR said:

So for clarity, in the video you were stopped in neutral and turned off the engine and the noise/rattle decreased in frequency after engine off?

Click to expand...

Sorry I should have written it better but I was coasting in neutral (the sound is only present when coasting in neutral) and turned the car off while still coasting and the noise was unchanged and the vibrations through the shifter were still there. The tapping goes away if I come to a complete stop, put it against a gear or give it throttle while in gear. When I moved the shifter I was demonstrating how touching a gate for a gear stops the rattle instantly

 

G

Goods70

Member

Oct 10, 2021

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Maryland

Oct 12, 2021

#9

• Oct 12, 2021

• #9

Hybrid707 said:

Bump, the only way to get the metal tapping (sounds like someone hitting a fence pole with a screwdriver) to go away while coasting is to push the shifter slightly against a gate for a gear with the clutch in. Other than that brakes, pedal and rpm do not affect the noise

Click to expand...

Did you bend the separator plate that goes between the bell housing and block?

 

H

Hybrid707

Member

Feb 26, 2020

40

3

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California

Oct 12, 2021

#10

• Oct 12, 2021

• #10

update: my u joint on the yoke side has a crazy amount of play, gonna take it to a machine shop

 

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