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In conventional differentials the same torque is applied to both wheels, regardless of traction conditions. Thus, if one wheel is on a surface with low enough traction for the applied torque to exceed the traction, that wheel will break loose and spin until it is revolving at twice the speed of the ring gear and the other wheel has stopped turning. All the power will then be delivered to the spinning wheel and no power will be transmitted to the wheel with traction. Limited slip or torque biasing, and locking type differentials have been developed to overcome this.
Limited slip differentials found on passenger cars all operate on the same principle. Clutches are inserted between the side gears and the case. When the clutches are engaged they lock the side gears to the case and prevent the differential action. Either stacked plate or cone type clutches are used for this purpose.
Torque biasing or locking differentials are used in on-road vehicles and in off- highway equipment. Some locking differentials lock and unlock automatically, while others are arranged so the operator can lock them when full traction is needed at both driving wheels.
Petro-Canada Lubricants DEXRON® LS (Limited Slip) Gear Oil 75W-90 is a synthetic extreme pressure automotive axle lubricant formulated for General Motors vehicles. DEXRON® LS Gear Oil 75W-90 provides excellent long-lasting wear protection to extend equipment life and reduce downtime and maintenance costs, providing year-round performance. This premium synthetic gear oil is designed with added friction modifiers to perform in limited-slip differentials† and is an API GL-5 quality product that meets GM requirements for 9986290 (or GMW16445).
| DEXRON® LS GEAR OIL 75W-90 | DEXRON® GEAR OIL 75W-90 | |
|---|---|---|
| Viscosity, cSt @ 40°C | 83.8 | 88.5 |
| Viscosity, cSt @ 100°C | 14.4 | 15.2 |
| Viscosity Index | 179 | 182 |
| Brookfield Viscosity, cP @ - 40°C | 38,142 | 41,391 |
| Pour Point, °C/°F | <-57/<-71 | <-57/<-71 |
| Flash Point, COC, °C/°F | 183 / 361 | 187 / 369 |
Petro-Canada Lubricants also offers a non-LS API GL-5 gear oil - DEXRON® Gear Oil 75W-90 formulated for GM vehicles. Please speak to a company representative to learn more.
DEXRON® is a registered trademark of General Motors LLC.
†DEXRON® Limited Slip (LS) Gear Oil is primarily for use in axles in cars and trucks with plate type GM LS differentials.
DEXRON® Gear Oil 75W90 is particularly suited for applications requiring a synthetic gear lubricant that meets General Motors 9986285 (or GMW16433).
| DEXRON® LS GEAR OIL 75W-90 | DEXRON® GEAR OIL 75W-90 | |
|---|---|---|
| Viscosity, cSt @ 40°C | 83.8 | 88.5 |
| Viscosity, cSt @ 100°C | 14.4 | 15.2 |
| Viscosity Index | 179 | 182 |
| Brookfield Viscosity, cP @ - 40°C | 38,142 | 41,391 |
| Pour Point, °C/°F | <-57/<-71 | <-57/<-71 |
| Flash Point, COC, °C/°F | 183 / 361 | 187 / 369 |
Petro-Canada Lubricants also offers a non-LS API GL-5 gear oil - DEXRON® Gear Oil 75W-90 formulated for GM vehicles. Please speak to a company representative to learn more.
DEXRON® is a registered trademark of General Motors LLC.
†DEXRON® Limited Slip (LS) Gear Oil is primarily for use in axles in cars and trucks with plate type GM LS differentials.
