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How to Downshift a Manual Car Correctly
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Historically we downshifted manual transmissions because brakes were unreliable.
This fallibility of brakes persisted well into the 1960s.
At that time, automotive manufacturers implemented dual braking systems.
These systems created two independent sub-systems; therefore, if one system failed, the other would continue to work normally.
As well, if the entire system failed, the parking brake served as yet another failsafe.
On slippery conditions, skid pad tests have shown that rear-wheel lock up can be potentially dangerous.
Thus, for riders and other drivers, if the rear wheel lock up on slippery roads, a driver or rider could potentially lose control of his/her vehicle and risk a crash.
Finally, why would drivers use a $15,000 drivetrain to save $400 brakes?
This has been the dominate theme in downshifting a manual car for the purposes of slowing the vehicle - save the brakes!
Relatively speaking, brakes are inexpensive compared to a clutch or other drive train components; therefore, use the brakes.
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