Originally Posted by
acrowder
You can't replace the body of the freewheel. Freewheels and cassettes aren't really meant to be serviced - if there's something wrong, you just replace the whole thing.
Some people seem to enjoy taking apart freewheel bodies and greasing the ball bearings. I have never had one that needed it, so soared myself the trouble. I just dribble a little 10w-30 inside once in a while.