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Member Since 28 May 2008
Offline Last Active Apr 08 2009 09:49 AM

Posts I've Made

In Topic: Fiesta booming noise at 45 mph

10 June 2008 - 10:51 AM

is the noise still apparent if you

1. press the clutch down at 45
2. coast in neutral at 45?

Thanks, I'd thought of 1. and pressing the clutch makes no difference. I am guessing 45 mph is a resonant frequency spot for something vibrating. It's weird as the car drives normally other than this noise.

I'll try No.2 to see what happens.

In Topic: Fiesta booming noise at 45 mph

07 June 2008 - 09:00 PM

have you checked all the tyres for bulges or splits?

Also hae you had the weehls checked for buckles or out of balance?

wheels bearings would be more apparent if you gently swerve the car left to right you should hear it change sound.

After this i would then look towards towards the transmission

Thanks for the advice. All tyres were changed this year at the same time and are the same as before, i.e. Michelins. I don't remember if the wheels were balanced but I don't get any vibration at all just the booming resonant noise. I had a wheel bearing go once before and it was much more high pitched so I am leaning towards a transmission noise now.