I have a '53 Chevy 1/2 ton, I have dropped the leaf springs so that I could pull the driveline back to allow me to install the transmission. It has been a while with the driveline on the floor as I am waiting on locking plates for the universal which are on back order. I have now noticed oil has leaked from the differential through the new okie bushing onto the floor. Is it even remotely reasonable to expect it won't leak the other way once everything is back together? Thanks for any input.