Early History
In 1932, Ferdinand Porsche designed a Grand Prix racing car for the Auto Union company. The high power of the design caused one of the rear wheels to experience excessive wheel spin at any speed up to 100 mph (160 km/h). In 1935, Porsche commissioned the engineering firm ZF to design a limited-slip differential that would perform better. The ZF "sliding pins and cams" became available, and one example was the Type B-70 for early VWs.
Read more about this topic: Limited-slip Differential
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