2013 Toyota Tacoma Double Cab Owners Manual - Page 493

2-4. Using other driving systems Manual transmission 4WD models: Before using the rear differential lock system. Stop the vehicle or reduce your speed to less than 2 mph (3 km/h). Depress the clutch pedal and put the front-wheel drive control switch in the L4 position to see if this is sufficient. If this has no effect, additionally use the rear differential lock system. Be sure to stop the wheels. Depress the clutch pedal. Press the RR DIFF LOCK switch. After the rear differential is locked, the indicator will come on. 2 When driving Slowly release the clutch pedal. Unlock the rear differential as soon as the vehicle moves. To unlock the rear differential, push the switch again.