So I am trying to adjust the preload on the wheel bearings on the D80 in the rear of my 98. 5 DRW 4x4 3500, but when I go to adjust the bearing nut, a 2 3/8th socket is too small, and 2 7/16th socket wont fit into the opening. 
So trying to find the right socket, I have been to 4 different auto parts stores with no luck.
Could someone please tell me the correct size socket so I can order it from Napa?
Thanks, Ben

So trying to find the right socket, I have been to 4 different auto parts stores with no luck.

Could someone please tell me the correct size socket so I can order it from Napa?
Thanks, Ben