2003 INFINITI G35 User Comment / Complaint

Copy of what i sent to infiniti via infiniti.com: my 2003 infiniti g35 has been into the orlando infiniti dealership twice for a transmission issue. in the last trip it was at the dealer for eighteen (18) days and the issue is still unresolved. after speaking with the service manager, john, i was told that he called infiniti technical support who stated that the problem is considered normal operation. i would like to know under what circumstances a transmission jerk at around 40 mph is normal, as i have never driven a vehicle that has done this, including the 2007 g35 courtesy car that infiniti loaned to me. if this is considered normal operation, would not all infiniti vehicles exhibit this? on the nhtsa.gov website there are eight (8) pending complaints of owners experiencing transmission problems, and two (2) technical service bulletins listed. also, after speaking with the service manager, john, it has come to my attention that there are other g35 models at this dealership experiencing the same issues; and theirs are also still unresolved. i am asking that i be treated the way a customer should be, as this situation has been handled very unprofessional. i have documentation of all work orlando infiniti performed and i would like this to receive immediate attention as i do not feel safe in a vehicle with transmission problems. thank you.