I have a 52 3100 I had just converted from a closed driveline to an open driveline. The pinion seal on the replacement rearend is leaking. NAPA lists three different possible rears for the year rearend I had installed which is between 54-59. How can I tell which rearend it is and can I replace the seal myself. Do I just remove the driveshaft, the the big nut, pop out the seal and install the new one? Is it that simple?

Any help is much appreciated.
Thanks


52 Chevy 3100 5 Window, LS Swap, 4spd Auto, Vintage Air AC / Heat, CPP Power Front Disc Brake Conversion with bearing upgrade, Power Steering Conversion, LED Tail Lights