Date: Thu, 20 Nov 2003 09:47:42 +0000 From: Grunff <grunffnopsam.com> Subject: Re: speed specific "shimmy"
nobody wrote: > hello, > I have a 1995 900SE V6 with 130000mi... recently i have noticed a speed > specific shimmy which begins at around 65 mph and gets pretty bad by 75 or > so... it has become violent enough that the passenger side belt buckle > thrashes around to some unknown resonant frequency at this speed. It > becomes most violent during heavy breaking, especially coming down a > particular hill. any clues? my mechanic and I are at our wit's end... he > wants to just start replacing things, and I am more of the bubble gum and > duct tape school fix-it school. thanks, -trip Could be lots of things, but the most common (roughly in this order) are: Front wheel balance Rear wheel balance Warped front disks Play in steering (rack or track rods) Worn upper strut bearing Play in engine mounts So first have the wheels balanced, then start looking for wear in the front suspension/steering. If you're sure there's none, start looking for wear in the rear suspension. Since you say it gets worse during heavy braking, I'm thinking warped disks. -- Grunff