It will make sense when you remove the old ball.  The shaft it slides on it not straight.  It is flat metal and towards the end there is a widened piece that the ball pops over.  This keeps it from popping off.
I suspect you will have a fun time getting the old one off.  It will be easiest to take a hacksaw and cut it on both sides.
Z 

     On Tuesday, March 10, 2015 12:09 PM, T Collins <tonycollin@GMAIL.COM> wrote:
   

 Hello Volks,

I want to save money (don't we all) and I need to replace the shift lever
ball located at the selector shaft of the transmission.

Bus depot has this ---> http://www.busdepot.com/251711131c  just the
plastic ball portion that I assume just slides on the lever.

But here is the question: How does one secure this to the lever to avoid it
being ejected? Does one have glue/epoxy or something like that? Anyone have
experience with replacing only this plastic piece?

I would like to find reverse again :)

Thanks,
Tony