my car has done this several times where it would buck just cruising down the road. It doesnt feel like the motor surging more like transmission is trying to shift rapidly in and out of gear. The shifter seems to work ok but when going through the gears the console doesnt match up with the gear ie N is actually OD etc. but it feels like it is going into a detent could this be causing my problem? How or where would i be able to go about looking at this?