Loud Bang During Hard acceleration

I have a 2006 X5 4.8is. During a hard acceleration from a stopped or rolling position my vehicle sometimes makes a load bang noise emitting from the rear. I have recently replaced the subframe bashing with polyurethane ones and also two rear differential bushings. Does anyone have any other suggestion? Are there any other common problems that I can look into?

Originally Posted by Buzz110

I have a 2006 X5 4.8is. During a hard acceleration from a stopped or rolling position my vehicle sometimes makes a load bang noise emitting from the rear. I have recently replaced the subframe bashing with polyurethane ones and also two rear differential bushings. Does anyone have any other suggestion? Are there any other common problems that I can look into?

Do a search on it, but it sounds like it could be the main drive chain inside the transfer case. It is a known problem with these chains stretching with time, and under acceleration they jump a tooth on the sprocket, making the noise.

Thanks I will definitely check that out.

Originally Posted by Buzz110

Thanks I will definitely check that out.

2006 X5 uses XDrive, no longer has chain in xfer case (those are for pre 2004 X5).

Originally Posted by HPIA4v2

2006 X5 uses XDrive, no longer has chain in xfer case (those are for pre 2004 X5).

Thanks, i have an '02, and didn't know about the change.

Any other suggestion then.

The common problem with X5 6-sp is bang noise during tak-off or stopping (like being rear ended from behind), dealer usually re-program the trans to smooth that transition.