try taking out the birfs. if they are easy a pain to take out most likely you have a bent housing.
when i got my new one and slid the birfs in, i knew right away taht my old one was indeed bent.
it is easyier to tell empty on the ground. it has a good arch to it. nothing that shows in pictures.
a local frame and axle shop said they could straighten it but i decided to get a new one.
i always go to the local junk yards. ill pull one for you .
if you can wait till sale day its 1/2 off but it might not be there anymnore