[Ron in Quincy]

Just a note of caution:

The original rear axel castle nut is special hardened, 5/8-18. That is why you can torque the nut to 90 lbs. without damaging the threads on the axel. You can verify this by looking at a "Dealers Price List" book. Have seen threads on a axel ruined by some one replacing the castle nut with what I call a "butter castle nut"

Ron