Wass up Guys, Gals.

I'm working on this Accord,Automatic trans I serviced the tranny, replaced the Half Shaft on the Pass. side and replace the Rad, When I went to test drive it, It was all good, then It just would not move.
There was a loud THUD sound and now when you try to put it in to park it grinds.
Man This Honda has been a tough project.
Give me a VOLVO anyday, Im at home on these cars.
Anybody have any Ideas.
Is the half Shaft Broke, or Wrong, Or is it the new Rad or the new fluid.
It has to be one of the three.

Thnks
Bobby Gee