Anyone ever tried a Lock Right diff in a D 60?

Thanks for the info. Ive been looking into one mainy based on price and the fact that my spers are loose and clunk. How severe was the noise and jerking? Something severe or easy to get used to? Itl mainly be used for hauling dart to the strip a couple weekends a year but mostly driving to work. Btw i live in the sticks and the 4 mile trip to work doesnt get plowed much in winter. I also do alot of playing in the mud. Just wondering if they really work as claimed. I can get a new one for less then $400 dollars and basically just replace the spiders with it, or spend over $600 sore a real unit and have to mess with ring gear