i took the front and center diff apart to change the oil and to put the lock block in the center diff. in the instructions and exploded views, it shows the assembly which goes in this order- the gear(gs006) then the aluminum shim(gs096) and then the gasket(gs075) and then you screw it into the diff case. when i took apart the diffs, the gasket was before the shim. when i reassemble the diffs, should i put the gasket before the shim like it was when i took it apart, or should i put the shim before the gasket like it shows in the exploded view(shim goes between gasket and gear)?