The Transmission of the car is one of the thing we need to take
care of the most beside changing the motor oil. Failure to do so will result in severe and expensive damage to
your Bimmer. Once you notice a slight roughness or grinding sound of the
transmission, action MUST be taken promptly to avoid any further damage. The
must usual case is that the transmission is low on oil. Drain out the old fluid
and top up with new fluid. Based on personal experience, the
dealer charges around $200 while AAMCO charges about $100 for a full fluid
change or best of all, do
it yourself. The choice is yours.
If the noise persists, it could be a clogged transmission filter which is
preventing fluid from reaching the pump. This will result in severe damage to
the pump and other components. In this case, be prepared to empty out your
If you can check your transmission fluid, check for discoloration, if it is
brown in color, it means that it has been burned, if you smell the burn, drain
and replace immediately. Don't forgot the filter.
If you drive in any conditions indicated below, make sure you check and
change your transmission fluid more often.
stop-and-go and driving in heavy traffic.
in hot weather.
in dusty conditions.
at sub-zero temperatures.
on steep hills or mountains on a regular basis.