Differential service
The differential delivers power to the drive wheels while allowing wheels on the same axle to turn at different speeds. During a turn, the outside wheel travels farther than the inside wheel. Its gears and bearings rely on correctly specified lubricant to handle the load.
Protection under load
Gear lubricant forms a protective film between working surfaces. It must protect them under pressure, at hot axle temperatures, and during cold startup. Maintaining the correct fluid supports the durability of the gears and bearings.
Mobil’s synthetic gear-lubricant information describes resistance to heat, oxidation, wear, corrosion, and foaming, along with viscosity stability. These properties help maintain the protective film during demanding operation. The formulation also provides friction characteristics for many compatible limited-slip differential applications.
Selecting the right gear oil
We use Mobil synthetic gear oil in the viscosity and specification required by your vehicle. Products such as Mobil’s 75W-140 limited-slip gear lubricant have specific application requirements. Axle design, manufacturer guidance, and limited-slip requirements determine the correct lubricant.
Recommended service interval
Our typical service reference is 30,000–50,000 miles. Your owner’s manual and vehicle use guide the actual schedule for each serviced axle. Ask about the correct fluid and interval, especially when reviewing a four-wheel-drive vehicle’s maintenance history or a vehicle regularly used for towing.