Lubricants used for gearboxs (manual or automatic) and the rear differential in your vehicle are different from those used for the engine. Transmission Lubricants have a life much more important. They must last 120000 miles for a truck or even the lifetime of the vehicle for some models such as Mercedes-Benz. Transmission lubricant must be chosen in accordance with the recommendation of the manufacturer of your vehicle.
Mineral lubricant designed for gearboxes...
Transoil Expert 10W40
Technosynthese lubricant designed for...
Gear Competition 75W140
100% synthetic racing lubricant based on...
Moly reinforced for "noisy"...
Gear 300 75W90
100% synthetic lubricant for all...