2005 GP 120k
A couple months ago I recently changed my trans fluid/filter with Valvoline max life and some Lucas transmission fix because it started to slipping into gear's "long shifts". I haven't noticed anymore slipping since the fluid change and shifts a lot better then it used to!. Yesterday morning before I left work I started my car to let it warm up no more then 10 minutes before I left "37'F outside" . As soon as I got on the road I noticed that my RPM's were kinda fluttering but when it shifted it was fine "no slipping" It kinda felt like my car was acting like it wasn't getting enough fuel or it was misfiring? I've seen a video on youtube the was similar but not as bad.
Btw if a sensor or solenoid would go out in the trans would it throw a code?