the quicksilver is a reverse lockout legal shifter
its a ratchet, from park when you pull up and then back you can get reverse and neutral . then it drops down into the lower drive gate
once there if you push forward its neutral and wont go any further , if you pull back it only moves one gear per pull and only through drive gears ,
once in drive gears the only way to get to reverse is you have to put it in OD (D on th400 or 1st on reverse pattern th400) and pull the handle up and out of the drive gate and then forward past neutral
on a th400 with reverse manual valve body and with transbrake you have to put it in neutral and engage tbrake solenoid to get reverse
you can also install switches on the shifter (supplied) to keep the reverse lamps and neutral start or easier just keep the lockout linkage hooked up at the trans to column