Trans vibration??

Lash

New Member

Jul 19, 2006

36

0

0

Pewaukee, WI

Aug 24, 2006

#1

• Aug 24, 2006

• #1

My car has a pretty bad vibration at around 65+ mph....but only when it's in 5th gear (you can feel the shifter handle buzz) When it's in 4th @ 65+ it's non-existant. Also...when it's vibrating/buzzing in 5th....it goes away when you let off the gas.

What could cause theis problem?

 

ninety15.0

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Mar 10, 2004

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Aug 24, 2006

#2

• Aug 24, 2006

• #2

My brother has the exact same problem right now as well. Im leaning towards the driveshaft not being balanced very well. He has a steeda tri ax and 3.55's. i see you have 4.10's do you have the stock shifter...stock driveshaft?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Aug 24, 2006

#3

• Aug 24, 2006

• #3

The DS should be spinning at the same speed whether in 4th or 5th (if absolute speed is the same).

 

ninety15.0

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Mar 10, 2004

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Aug 24, 2006

#4

• Aug 24, 2006

• #4

HISSIN50 said:

The DS should be spinning at the same speed whether in 4th or 5th (if absolute speed is the same).

Click to expand...

Thats a good point and i knew i should have said something about that...and of course you caught it. However...i have a theory. When you are in 4th at 65+ with 4.10's you have to be pressing the gas pretty considerably to maintain speed (3400 rpms??)....at least considerably more than you would in 5th. That given, the additional load may be changing that vibration. at 65 in 5th there is practically no load on the motor...vibration would be more prevalent!? when he lets of the gas completely it goes away...maybe because you have the reverse scenario as when there is a load on the drivetrain in the forward direction. thats my theory anyway?

 

Lash

New Member

Jul 19, 2006

36

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0

Pewaukee, WI

Aug 24, 2006

#5

• Aug 24, 2006

• #5

HISSIN50 said:

The DS should be spinning at the same speed whether in 4th or 5th (if absolute speed is the same).

Click to expand...

Exactly. That's what I was thinking. If it was the DS....you'd think it would happen in 4th and 5th (possibly not at the same speed though). 4th is smooth as butter all the way through..... 5th is smooth til 65.


The DS is stock. I did notice that it does have a fair amount of rust on it. I wonder if that would play a part????
Shifter was stock...recently replaced with a short throw....but the problem is still there.... no changed at all.

 

S

speedytang

Founding Member

Jul 28, 1999

765

1

17

Marengo,Ohio,US

Aug 25, 2006

#6

• Aug 25, 2006

• #6

Sounds like the 5th gear carriar bearings is worn and causing the problem.

 

Lash

New Member

Jul 19, 2006

36

0

0

Pewaukee, WI

Aug 25, 2006

#7

• Aug 25, 2006

• #7

speedytang said:

Sounds like the 5th gear carriar bearings is worn and causing the problem.

Click to expand...

Ahh...that would make sense.

 

trbkrb

Founding Member

Jun 4, 2001

1,976

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39

Houston, TX

Aug 25, 2006

#8

• Aug 25, 2006

• #8

Mine vibrated and had the same on/off throttle symptoms quite a bit when over 55 MPH in 4th and 5th. I did replace the driveshaft with an aluminum one and it is better, but it still vibrates over 75 or so. I know my tranny probably needs a rebuild (over 200,000 miles on it) so I do agree that it is probably the bearings in the tranny. I plan to get it rebuilt soon.

Good luck on it!

 

S

speedytang

Founding Member

Jul 28, 1999

765

1

17

Marengo,Ohio,US

Aug 25, 2006

#9

• Aug 25, 2006

• #9

I have a T-5 apart now that started that vibration and finally could not get it in 5th gear. The 5th gear bearings are so bad that it moves on the shaft a good 1/2" up and down.

 

Mr. Rustypwnz

Advanced Member

Jun 1, 2005

1,761

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69

indianapolis/ valdosta ga

Aug 25, 2006

#10

• Aug 25, 2006

• #10

hey how much is it to rebuild a t5?

Thanks josh

 

Lash

New Member

Jul 19, 2006

36

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Pewaukee, WI

Aug 25, 2006

#11

• Aug 25, 2006

• #11

I though 5th gear didnt have bearings?

I though that a dig drive gear spins even with the countershaft and the small driven gear rides on the output shaft, both on splines.

 

87Mustang351

Member

Sep 12, 2005

220

1

16

Canada, Nova scotia, Cape Breton

Aug 25, 2006

#12

• Aug 25, 2006

• #12

i would say its either ur tranny mount or the bushing in the tail end of your transmission (Y)