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S 90 options.... S90-V90

It is a locking differential, somewhat different from a limited slip, simpler as it locks the wheels when spin is detected. It splits power 50 50 or not at all. A limited slip will transfer power to the wheel with the most traction. A locker is more reliable as there are no clutch packs to wear out. To find out if it has one you have to spin the wheels on poor traction surfaces, both wheeels should spin equally.






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