I have had this problem for quite some time like since 40000kms ago, but it has'nt harmed the car. When every i put my car into Drive or Reverse the car goes down a little, its like my transmission housing is lose or something, is this normal does it happen to other older 318i's, i have 1996 model
what you are feeling is the transferring of power from the flywheel to the tranny, making the car bounce a little. Its normal. if the car were actually lowering, then you would be driving underground by now.
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I never noticed my car "jerking down a little" at all. I have a 96 318i as well (Manual). What I have noticed, is my RPMs actually drop when I reverse, then stop to shift into 1st gear. My car has actually stalled a couple times over the past year and a half from this thing...
__________________ 1996 318i
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Seems normal to me. I haven't seen this in any 5 speed manual cars. However, my friend has a E34 535 auto and when he changes from reverse to drive I can see his car's ride height move slightly up, then slightly down.
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Yes it's normal.
Front wheels are not rotating, when you shift into gear, torque is applied to the rear wheels, which makes them rotate the slightest bit. Since the front wheels arn't moving anywhere, the slight rotation in the back is enough so that it "sucks" the back end of the suspinsion down. I realize this is hard to understand ant it's a difficult concept of physics to describe and explain without an animation or diagram, but this is what's happening. All cars do this to some degree.
Try doing it with your handbrake on REALLY TIGHT. It may not move down at all since brakes are now applied to the rear wheels., it may do the exact same thing as before if the handbrake is weak & needs adjusting. Mine's all wore out from the power slides and drifts that I do. (open differential, so I need some e-brake help to get my back end loose )
Nothing's wrong with the transmission\engine mounts. (from what you describe)
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