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Old 07-12-2011, 09:14 AM   #19
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sstory0626's Avatar
Join Date: Nov 2007
Location: Eastern Iowa

That is a very informative video!

I think the point may be missed, however, that the pawl that engages the spinning weights is itself counterweighted on the bottom. So even though the spinning weights have stopped spinning relative to the carrier, the pawl is spinning relative to the case and the counterweighted bottom is being pulled outward towards the case. At a certain speed, the pawl will be pulled out of engagement with the spinning counterweights and unlock the diff. If you cut the lower counterweight off of the pawl, it would still retain the requirement for a difference in axle speed to lock, but would not unlock after a certain speed. Weld the spinning weights to the case, and you have a standard clutch-type limited slip. Remove the weights, and it will never lock up,

I think that unlocking action at speed is the whole reason for this type of diff to exist. If it merely locked with a difference in relative axle speed, how is it different than a standard Eaton clutch-type limited slip without counterweights? As a matter of fact, the standard type will lock with only a TORQUE difference, but this one requires a SPEED difference as well.

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