take and disconect the brake rod from the brake pedal under the running board then remove the adjustment nut thats is on the end of the rod and then take a flat head screw driver and get under the lip of the on seal and prise it out sometimes u will have to drive the srew drive under the lip which is on the out side of the housing then do in reverse to put back to gether it is a pretty simple job once u have done it once
u have to get the numbers off the to of the bell housing behind where the starter bolts on but the part number is all the part numbers is for the same seal
G'day those seals are avail aftermarket but they are nowhere near the quality of the N/H ones we have tried a few over the years and have not had much success with them. Also to fit them bak into the housing i use a big socket that fits on the outside of the seal ( 3/4 drive so the rod goes through ) and a spacer or 2, flat washer and wind it in with the nut on the brake rod. Good luck with it:thumbsup: