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Message: <blockquote data-quote="5150" data-source="post: 706767" data-attributes="member: 4173">Hi, i'm drivin the same model like xcept mine is 96. Changed many things already so cant remember exactly. I'm not an expert but this is my opinion. Try changing your gearbox oil by using the BMW ATF oil and also change your rear axle oil by using Redline High Performance oil. And then change your air filter it may be shredded to pieces like mine was when i was having the damn vibration problems.... If prob still persists then check these things first:1. Fuel pump - if its never been changed then change it. And if you change the pump make sure you change the floats also, there r 1 float for each tank.2. Fuel filter.3. MAF sensor.4. Camshaft sensor.In my experience gearbox problem is when there is a problem in changing gear whether upshifting or downshifting meaning it cant engage gears. Another one is the torque converter prob which gives a symptom similar to clutch slips in manual trans cars. So if u dont hv these problems better leave the gearbox alone bcoz its unlikely to be the culprit.But i bet it is your air filter, if you had never changed it la <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />Gud luck.</blockquote>