Noisey noise

[Animal]

Had this problem twice on a private test track.
When I slow down from around 130 I get a reall loud deep buzzing sound! Doesn't do it any other time. It carrys on right down till I take my foot off and put it back on. Any ideas?

[marko]

have you got grooved discs fitted by any chance !!!

[Animal]

Nope. Just bog standard ones.

[Phil69]

There's a chance your exhaust could be touching and vibrating on the underside of your car. Try it in first gear and see if it does it then as well....the engine tilts more under reverse torque in lower gears. Also, reverse may give an indication as well.

[Stig]

Check the disks for small hair lines cracks in em my mate gets the same prob on his monaro.

Obviously on a private test track!!!