Aluminum Driveshaft Howls???

cmb91LX

New Member

Apr 20, 2004

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Memphis

May 11, 2004

#1

• May 11, 2004

• #1

I have just put on a FRPP aluminum d/s on a 99GT and I didnt really notice any difference. The deal is, when I am driving in the neighborhood slowly I can hear like a harmonic howl until I almost stop completely. It is almost like a deep whistle. Anyone had similar experiences?

 

Dark Knight GT

I can't get it up......ok that didn't sound right.

May 26, 2003

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Ozark, Missouri

May 11, 2004

#2

• May 11, 2004

• #2

Could be your gears.

 

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geegee

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Oct 21, 2000

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near Oklahoma City, OK

May 11, 2004

#3

• May 11, 2004

• #3

cmb91LX said:

I have just put on a FRPP aluminum d/s on a 99GT and I didnt really notice any difference. The deal is, when I am driving in the neighborhood slowly I can hear like a harmonic howl until I almost stop completely. It is almost like a deep whistle. Anyone had similar experiences?

Click to expand...

Aluminum probably transmits rear end noise (gears/bearings) moreso than your old driveshaft. You may also have a bad u-joint (even though just replaced).

Jeff

 

C

codyGT

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Apr 11, 2004

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Nebraska

May 11, 2004

#4

• May 11, 2004

• #4

Hmmm, I must be the only one who noticed a little top end increase with a Aluminum DS. Most people can tell in F-Bodies too.

The howl is from Transmission or rear end gear whine being carried by the aluminum. Some do it some don't, mine is quiet except for when i am at the top of first. But thats because of the gear ratio.

 

cmb91LX

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Apr 20, 2004

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Memphis

May 11, 2004

#5

• May 11, 2004

• #5

I am not saying I didnt feel the difference, I just didnt really feel the difference in performance. Maybe a little up top. What i did notice is the total smoothness of the driveline inproved dramatically. It does buck a little when in reverse or in first but nothing major. Just a low howling noise that almost sounds like a jet engine howl from far away, hell I dont know how to exactly desribe the sound except a howl that wasnt there before the d/s was installed.

 

G

GinoGT

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Aug 11, 2002

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May 11, 2004

#6

• May 11, 2004

• #6

It's the 4.10's.

 

C

codyGT

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Apr 11, 2004

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Nebraska

May 11, 2004

#7

• May 11, 2004

• #7

Ooops I didn't read you had 4.10's, thats why you hear a whine.

 

BMan5150

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Feb 19, 2002

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Columbus, OH

May 11, 2004

#8

• May 11, 2004

• #8

codyGT said:

Ooops I didn't read you had 4.10's, thats why you hear a whine.

Click to expand...

Ditto for me, and it's definitely a mild gear whine that seems to be amplified a little by the alum. DS. No biggie.

 

RoadRunnerGT

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Jul 9, 2001

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NC

May 12, 2004

#9

• May 12, 2004

• #9

cmb91LX said:

I have just put on a FRPP aluminum d/s on a 99GT and I didnt really notice any difference. The deal is, when I am driving in the neighborhood slowly I can hear like a harmonic howl until I almost stop completely. It is almost like a deep whistle. Anyone had similar experiences?

Click to expand...

It's not your gears. I had the exact same sound when I put the DS on. It sounded like a reverberation from the rear of the car near the back glass. This sound wasn't there until immediately after installing the DS. I still have the stock gears also.

For some reason this sound has gone away, not sure why.

Hope this helps.

 

cmb91LX

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Apr 20, 2004

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Memphis

May 12, 2004

#10

• May 12, 2004

• #10

GinoGT said:

It's the 4.10's.

Click to expand...

Is this a problem. Does it mean something is wrong with the rear or is this a normal sound with such low gears?

 

C

codyGT

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Apr 11, 2004

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Nebraska

May 12, 2004

#11

• May 12, 2004

• #11

No two gear sets wear in the exact same some make a slight whine. It's nothing to really worry about. Some of the F-Bodies I put Aluminum D/S in made the same whine with 2.73/3.23 stock ratios.