Hey Mike. You will need to replace the seal on that flange. I did the one on my front shaft. VERY easy to do. Took no more then an hour and a half taking my time..
Matt - Great writeup! Im glad to see its helping other members make their own decisions on autolockers, and not listin to the hype created by the select few...
I find my lockright to be smooth. I mean im so used to it by now I know all the quirks! People who drive with me never notice a thing unless it pops on me

I love the hood lifting/tilting thing, makes me feel like my truck has more power then it does

Im insterested in the heavy gear oil idea, im running the 75w-80 Amsoil synth. On one hand I want to see how some heavy duty 140 would feel, but my pricy fluid has only 20k on it