The large rear main seals are easy to remove with a screwdriver. As long as you don't scratch the surface of the crank that comes in contact with the rear main seal just about anything goes :-) Insert the screwdriver so that the exposed back surface of the crankshaft (the part that comes in contact with the flexplate)is the prying point. Get the end of the screw driver up into the old seal and pry it out.

Double check the surface of the crank before inserting the new seal. I usually go over mine with light abrasive cloth and check visually and with your finger for sharp edges. Lacquer thinner is helpful in removing buildup and stray abrasive material before installation of the seal.

Grease the seal and the crank with white lithium grease. Be careful not to get the edge of the lip hung up on the crankend when getting the new seal started. Get it started and then push the seal against the started edge to get the room you need to get it started all the way around. Once the seal is on the surface of the crank ALL THE WAY AROUND you you tap it into place evenly by working your way around the seal with your striking tool. A 3/8 or 1/2 socket extension allows you to direct the contact on the seal once it is started into place.

This installation advice is in reference to the older type seals. I am not familiar with the Viton.

Randy