Hi Kirk,

I have the same problem in my '05 545i, and just recently had the mechatronics valve body replaced in the trasmission (for a different problem), however even after changing the valve body and completely reprogramming the transmission, this "Slam" problem persists. I'm convinced that it is a design flaw that can't be fixed by software.

Check this out: Jaguar S-Type ZF Gearbox Lurch fault

Also do a search on the E60 Forum (E60 Forums?) for "Transmission Slam" (or just "Slam"), then grab some popcorn and start reading...

Good luck,
Randy...