Quote:
Originally Posted by josh18_2k
or maybe you're only locking one wheel when you pull the ebrake.
with an open diff, the speedo could stay the sameish speed while sliding around. one wheel slow + one wheel fast, speedo will see the average of the two.
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Why would it average wheel speeds? As Ted described, the speedo is driven by a by a cable, which directly connects to a plastic gear in the transmission - it's spinning in direct proportion (based on gear ratio) to RPMs the transmission output shaft/driveshaft is spinning.