780 V6-2849cc 2.8L SOHC B280F (1987)
Overdrive Switch - Transmission: Locations
The gear selector knob is provided with a switch for engaging and disengaging 4th gear.
1. Switch on gear lever knob (54)
2. Stepping relay in electrical distribution unit (136)
3. Solenoid valve in transmission (201)
4. Indicating lamp on combined instrument (102)
4th Gear Electrical System