Jperleon

i am new the the car so i dont know much, but i have a 93 rx7 and everytime i hit a bump i hear a little rattle in the back. i was wondering if anyone knows what the problem is. Also, it is an automatic but everytime it shifts in first gear it shifts harder than i would think. like i said im new to it and for all i know all auto rx7s shift hard.

Thank you