Switch Operation
WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
If OD switch is in the ON position, the TCC will lock-up once transmission is in 4th gear with vehicle speed greater than 45 MPH. If overdrive switch is in the OFF position, the TCC will lock-up once transmission is in 3rd gear with vehicle speed greater than 35 MPH at light throttle application.