Quote:
Originally Posted by ghoti
The same as having and Un-shimmed diff. All shimming does is "engage/lock" the diff much quicker.
Life expectancy depends on how you drive your car.
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Wrong.
The "locking" everyone speaks of is the incorrect mesh between the spider gears causing an internal bind. This ACCELERATES wear on the spider gears and they will eventually wear thin, or break. Its' the same concept as the OBX LSD insert for open diffs - it presses outward against the spider gears and cause bind against the case, causing the desired lock-up.
But, like everyone has said, it's a cheapo diff, so no harm no foul if it breaks.
-edit-
Previous post in this thread as visual aid for my explanation:
#/f/s-chassis/200226...ml#post2992103