i can't see in any way how the constant and random metallurgy metal on metal shock factor as the lunch-box or lock-right does not take it's toll on U-joints , pinion splines , and gear boxes too ?
the sledge hammer effect transmits all the up through the drive train ...
this equals a much...
my only reason i am restoring , rebuilding and refurbishing my 6X series rear full floating rear axle is the Ghetto Lunch-Box brand product failed in a terminal way , when it did both rear tires locked up instantly and at same time at highway speed 48mph approx. , the truck lost some control...