In the Image below what is that thing called?
anyone know that part Number?
How do i remove it to put it into a new axle?

 

try a prybar, or sometimes I use an air hammer

 

Thank you
I May have messed the rubber not sure yet

do i need to disassemble the ball joint to push it out with an air hammer
any other tips?

 

Remove brake caliper, remove rotor

Remove two 18mm nuts at the knuckle to strut connection
this will pivot the knuckle out so the axles spline can be removed from the hub

now that the axle is only held in by the trans, pry at the transmission to "POP" it out of the diff.

 

the part youre looking at is all one piece with the axle. You can only order the whole thing

 

actually, if he has an auto the part he circled is seperate. the 4t45e uses a male-male spline stub shaft, and the inner axle cup has female splines.

 

Doh. I always default to manual. Carry on.