Note: For more detailed information on the operation of the systems, please refer to the chapter "Operating Manual".
Depending on the configuration, blocking can be done in two ways:
1) Mechanical locking of the interaxle differential (C. DIF. LOCK). When you press a button on the instrument panel, the pneumatic drive located on the transfer case "rigidly" locks the center differential. This results in equal distribution of torque on the front and rear axles, which significantly improves cross-country ability.
2) Automatic locking of the center differential (viscous coupling). This system does not require driver intervention, but cars equipped with this system have worse cross-country ability compared to cars with the "C. DIF. LOCK" system. This is due to the fact that the viscous coupling does not provide 100% blocking and the clutch is activated with a slight time delay.
All-wheel drive diagram with viscous coupling
1 - interwheel differential,
2 - center differential,
3 - viscous coupling.
Technical data:
- Oil class according to API — GL-5
- Recommended viscosity - SAE 75W-90
- Refueling volume (when replacing) — 5.0 l
(Publication Reprinted from a web portal: toyotaman.ru)