My transmission downshifts hard from 2-1 at sudden stops. Almost feels like you have been ran into. Consulted my dealership and they said to install new program. After installing new program, the problem is still there. Driving the other day and slowed from 70mph to 60mph then proceeded to pick...

I have been taking my 7 in since may of this year for bucking sensation from 40mph to 30 mph. 1st I waited on new update for trans(did not work) then the super program directly from BMW(did not work) then megatronics(did not work) there are no doubts that these thing has made some improvements...