Put a piece of wood in between to protect the end of the shaft and hit
it with a 2 or 3 pound hammer.
  If  all else fails you could heat the inner part of the CV with a
simple propane torch while cooling the shaft with a cold wet rag.
And then "strike while the iron is hot".
  You should be able to heat things to at least the boiling point of
water and not worry about affecting the temper of the steel.
Larry A.

Shawn Wright wrote:

>After just re-installing my axles, I find one of the old boots (I replaced two of
>four) has a small hole allowing little blobs of grease out. This was one of the
>CVs I could not get off the shaft, so I put it back on. I suppose I could pull
>the *other* CV and install the boot from the other end, but I'd rather figure
>out how to get the stuck CVs off. I have removed the circlip and tried tapping
>the end of the shaft with a cold chisel while the outer joint was supported in
>a vise, but it would't budge. Both my inboard CVs are now stuck like this,
>and will wear out eventually...
>Any ideas appreciated.
>
>
>Shawn Wright
>http://members.shaw.ca/vwdiesels
>'88 Westy 1.6TD 5 speed
>'85 Jetta Diesel 1.6NA
>
>
>