Originally Posted by AV8R4AA

I'm having some rough downshifting problems.
Mainly very slow speed 2/1. Have ZF 6 transmission fluid and a filter on order.

Could someone explain the software update.
Where do I go to get that done?

I was wanting to take my BMW to a specialized ZF center.
Looked but no luck finding a ZF repair in the area.
A lotta guys named Bubba say they can "fixer up"