Unsolved I've been trying non-stop for last 3-4 hours for the 3rd time to figure this issue out

I've been trying to figure out how to make the semi shift up when I'm using arcade as soon as it hits redline (in this case 4k rpm) its easier to use arcades automatic shifting on keyboard imho. I hate it but it works, anyhow, if its a simple fix can anyone point me in the right direction or if its easier could someone just create a simple mod to fix my issue? that would made my day (today was pretty rough).

 

Try adjusting highShiftUpRPM in the engine or gearbox's vehicleController section.