Well I was out in the C3 today. Did a fairly quick little take off and on the shift to 2nd BANG!. Now I have no 2nd, no 4th and no reverse. Looks like I blew the sun shell, so I get to do a little rebuilding. Not good timing, if a damaged trans ever is.

Questions:
I have read you can just replace the sun gear with the hardened unit in most cases and be fine. Where are the teeth that sheared off gonna be? Will the rest of the trans be contaminated?
Bearing in mind that this is behind a LQ4, what other parts should I replace while I am in there?

Discuss.