I was driving my 2006 BMW 750 I and it began to jerk

What is your question?

I took too three places for diagnostics first place said it was my transmission and my Cadillac converters the second-place said it was my Cadillac converters or maybe a sensor in my transmission and a third place was to BMW dealership and said it was my transmission

What makes this problem better or worse?

I tried too drive it but it said transmission something and moderate acceleration

How long has your 2006 BMW 750i had this problem?

About 3 weeks