Standard equipment on GT500s is a harmonic resonance from the rear axle. To combat this feature Ford hung 9.5 pounds of iron on the rear housing ends. To get rid of resonance, you have to tune out the frequency. I changed my R&P to a 3.73 and noticed no difference. When I put in my TrueTrac, I aquired a cyclical "moan", soft to loud repeating at certain speeds. It was speed related on any road surface, but it wasn't gear noise. That wouldn't be cyclical. With the high tech axle weights on, it was a low frequency. With them off, it was a little higher pitch. I thought the TrueTrac was an "untuned for" frequency. It wasn't terrible, so I just lived with it. Recently I saw a paragraph in the Rock Auto Newsletter. It was for a brake noise damper made by Raybestos in Sweden (not China). Well, Raybestos is a reputable company, so I figured I'd try it. They come one in a package and you need two (~$60 including shipping). They take less than ten minutes per side to install, and if you've got ramps you don't even need to remove the wheel.
Conclusion: Without the Ford weights there's a faint resonance between 55 and 60 mph. The rest of the time it's quiet. With the Ford weights it doesn't work as well.
For a picture and video, go to:
RockAuto August Newsletter
Raybestos part number for the GT500 is H14354.
Who woulda thought it was brake noise!
I'm sooooo happy!
Steve
Conclusion: Without the Ford weights there's a faint resonance between 55 and 60 mph. The rest of the time it's quiet. With the Ford weights it doesn't work as well.
For a picture and video, go to:
RockAuto August Newsletter
Raybestos part number for the GT500 is H14354.
Who woulda thought it was brake noise!
I'm sooooo happy!
Steve
