[thespud]

start with the basics... have you tries wiring a new o/d switch?

 

[REN69]

Could be worse.. it could be stuck on OFF and you could be wasting more gas because you only drive 3 gears on the highway at 5000RPM, that happened with our old Toyota van.

I suggest you go to a wreckers and take apart an auto shifter from another corolla and take the OD button from it.

 

[complicatedname]

Unfortunately I need it off when I go up the massive hills when 2nd gear revs too high and 4th dosen't have enough power

How do I pull it apart? I don't see any screws.

 

[TRDemon]

You have to remove the panel that goes that it has two screws up front and two screws that are located by the two front sets.