I recently ran into transmission problems on my 2012 G37 sedan. Error code P0720, my car won’t shift past 3rd gear. I’ve been doing some research on YouTube and this forum. Seems to be a common problem with these transmissions and I would most likely need a valve body replacement. I came across rebuilt and refurbished valve body replacements on fivestartransmissionparts.com for $620 compared to $2k+ at the dealership. I was wondering if anyone tried the rebuilt valve bodies from five star transmission parts? If so how did it run after install? Any help is appreciated!