Perhaps only two weeks ago, I started noting a 'melodic' sort of whine at speeds from around 60km/h (37mph). I took the vehicle to a mechanic I trust (who I know through a friend) and the verdict, after some investigation, was a carrier bearing in the differential. He suggested I drive it till it sounds properly knackered before getting it rebuilt, as the cost would amount to AU$1000.
For the past 50,000km (31,000 miles) of ownership, I've always noticed a slight whine at highway speeds if you back off the accelerator slightly. The differential fluid was replaced with a good synthetic product of the correct grade/spec for my 320i 2yrs & 25,000km ago. Fluid that was drained did not smell bad, was of a good colour and didn't seem to be full of metal.
I've never heard much talk of differentials in BMWs of this era going bad. So for now, I'm just investigating my options... Would it be better just to source a good, secondhand, low miles unit from a junked vehicle, or would the rebuild be the better option (peace of mind of no failure and that sort of thing)?
For the past 50,000km (31,000 miles) of ownership, I've always noticed a slight whine at highway speeds if you back off the accelerator slightly. The differential fluid was replaced with a good synthetic product of the correct grade/spec for my 320i 2yrs & 25,000km ago. Fluid that was drained did not smell bad, was of a good colour and didn't seem to be full of metal.
I've never heard much talk of differentials in BMWs of this era going bad. So for now, I'm just investigating my options... Would it be better just to source a good, secondhand, low miles unit from a junked vehicle, or would the rebuild be the better option (peace of mind of no failure and that sort of thing)?