Rick wrote:
>
> Is it as simple as plugging lockers on the ends of the axels, or is
> there changing the diff, axels etc. from stock to make lockers
> function properly?

Are you referring to manual locking hubs or locking differentials when
you say "lockers".
Locking hubs are the kind you get out of the truck, turn the hub dial
from "Free" to "Lock" to engage the front axle. In Free position, the
front wheels freewheel. Locking differentials are discussed in great
detail on the following web page:
http://www.a1.nl/phomepag/markerink/diffs.htm

--
Roger