The predator can read and save sensor data and display it live on its own screen or you can hook it to a laptop and display it live or save it and later download to a computer and display it. There are free display software downloads from their website, it displays in a trend recorder format. It cannot do buzz or contribution tests, only read sensor data and codes. It also has the strongest tuner tunes I have seen yet, comparable to a 100-120 hp flip chip on max and it has a great towing tune plus you can pay for and download custom tunes if you wanted.
I would assume 4x4 would not matter since the GEM controls that stuff but I’m not positive. The only thing I really know that matters is if it is auto or manual which PMT2 would definitely be auto.
I got mine for $75 delivered from car-parts.com