noise from rear of car. grumbling

[rodrigo]

Hi guys,

After having the car for almost 60,000 miles (currently at 181,000) I finally have a weird noise coming from the rear end of the car.

A: When accelerating (accelerator pedal is down) there is no noise, when completely off the accelerator pedal (coasting) there is no noise, but in the 1-2 second transition of going from throttle to no throttle, there is a howling/grumbling that comes from the rear end (trunk area, etc). To make the noise go away, I can just accelerate again or wait a few seconds.

B:When I blip the throttle while driving there is knocking that also comes from the rear. Knocks when I hit the accelerator, and knocks when I let go.

What the heck could these noises be coming from?

The car has the original transmission and dif. with 181,000 miles. It is a 325i automatic (yes I would love it if it were manual but it is not, and I am not going to do a swap). Wheels are tight, nothing looks loose under the car.

Any suggestions/hints/experiences with this?


Thanks! :)

[jlevie]

I'll bet that an inspection by an experienced BMW tech will reveal likely causes for the car's symptoms.

[immajackuup]

i have that noise

[rodrigo]

i have that noise

What is that circled in the picture...bearing on the shaft side?

[rodrigo]

I'll bet that an inspection by an experienced BMW tech will reveal likely causes for the car's symptoms.

I agree. I do like to try asking here first as most people tend to have the same issues with the same cars. If it is something I can do myself, all the better.

[immajackuup]

What is that circled in the picture...bearing on the shaft side?

jack your car up then turn the shaft back and forward,you will hear that clucking sound. think they call it back lash which you just need a adjustment.