Found this about solenoid configuration for A340E:
http://home.wjw.co.nz/Toyota/A340/19manualsh.pdf
So I just think about put some alternating push button, 1 for each position P,R,N,D,2,L and an ON/OFF O/D button on the dashboard (instead of lever).
If we cut the D cable to ECU and connect it to push button, how will it switch between gears ? will it stay in 1st ?
In short, is this doable? what will be the consequences ? (engine stall, etc ?)
Thanks for enlighten me ...