Date: Mon, 25 Nov 2002 18:56:39 -0500 From: Four Weis <mweinopsamcom> Subject: Re: c900 harmonic droning?
Lance Morgan wrote: > I recently purchased a 91 900S (briefly had a 86 900T years ago), and > am really enjoying it. > > I've noticed something I'd appreciate comments on: a harmonic type > droning - always starting at 70 mph up to at least 85 mph, and have > also sometimes heard it ~ 45 mph in 3rd, albeit a slightly different > tone. > > The noise is moderate in pitch and, at high speed, has a repetitive > frequency of less than 1 second. It reminds me of riding in a twin > engine airplane Saabs were based on airplanes and Saab must have made prop planes at one time :-) This sounds like it could be tires, but because it sounds the same in 3rd at 45 and I assume 5th at 70 - I would have to say engine drive shaft related since it appears to happening at a specific rpm. > > > The noise completely abates when I push the clutch in, coasting at > high speed. > > Probable cause? > > Thank you, > > Lance > 5 spd 3dr 125K
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