Need Info on Pinion Seal Replacement

The procedure is right in the shop manual---you have one? What year model we workin on?

You can remove the pinion nut with an impact, or a homemade or even a pipe wrench on the pinion flange

Most these axles use a crush sleeve to set pinion bearing preload, it's extremely important not to "eff" that up.

So far as the driver, I would not be afraid to use whatever piece of pipe/ large socket, etc that you can get around the OD of the seal

The basics are

Remove rear drums to remove drag.

Use a small torque wrench to measure pinion drag

Remove yoke, seal, replace seal, replace yoke, and tighten nut to (they say) 210 lb lbs.

I always undertightened, and worked "up" for safety. I always marked the pinion nut flat with paint, etc, so I knew what flat it tightened to so that I had a reference.

Rotate the pinion several times, to "seat" check drag on torque wrench with your initial reading.