Date: Wed, 08 May 2002 18:06:25 +0100
From: Paul Halliday <>
Subject: Re: "Bumping" on 1985 900i

in article, Peter Thompson at wrote on 08/05/2002 09:50: > Hi, > > for some time now my 900i has been producing a sort of "bump" when > being driven. It appears to be in time with the wheel revolution and > is particularly noticeable at low speed on a smooth surface. At > higher speeds it manifests itself as increased vibration. It feels > like a flat spot or a bump on one of the wheels/tyres but I have > inspected both and cannot see anything obvious. The nearside CV joint > was replaced recently but didn't cure the problem. Other possible > related symptoms are that when changing direction (i.e from reverse to > forward or vice versa) there is often a single clunk. The only > potential problem I know about is that the nearside torque arm bush > needs replacement. > > Another issue that may or may not be related (I doubt it) is that my > front brakes are very squeaky/squealy even when they are not being > applied. The squeak is loudest when the wheels are straight or almost > straight. When they are turned any distance the squeak disappears. > Also, lightly touching the brake pedal also causes the squeak to stop > temporarily, as does going over a bump. Needless to say that the > brakes are very squealy when applied. > > Any suggestions as to where to look before I take it to my local Saab > techs? > > best, > > Pete Pete My 1985 900i did much the same thing - the front brakes squeeling, rather than the vibration. This disappeared completely after I had the front pads replaced and some work done for the MOT, including the OSF CV boot replaced. I've also recently had all the shocks replaced with gas filled and the ride is just great now - it glides :) Interestingly enough, regarding the vibration, my 1989 900 Turbo has a vibration problem which starts at 50mph and disappears at 60mph. This is a quite violent side-to-side vibration/shudder felt throughout the whole car, but I also get a little rattle when setting off in first gear. We could be having similar issues. Hope the part about the brakes helps. Regards, Paul 1985 900i 16V 1989 900 Turbo

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