1994 325i convertible -
Had car for about 3 months. Love it but recently noticed a 'whining'
noise whilst driving. Sounds like a high pitched jet engine noise. It's
not always there but probably around 70% of the time. Can be loud at
As i accelerate it gets a higher and higher pitch before dropping a
tone as the car shifts up a gear ( auto), then starts all over again...
Doesn't whine when car is sitting in neutral when I rev so it's
something thats happening whilst moving - bearings, diff or gearbox I
think.. Appears as much as I can tell whilst driving to be coming from
behind me - back middle somewhere??
Given it is affected by the gear change I am thinking gearbox??
What is it? Is it serious? Car appears to be driving fine!