RoadRunner did you ever have one of your three ATXs power flushed by a machine at a lube shop like Jiffy Lube before?
Also are seals within an ATX kept closed or sealed by grime and so when that grime is removed leaks can occur or when removing that grime clogs can form because the flush was not complete or when the grime was released the pieces were too large to be removed from ATX and so circulate causing damage?