knocking type sound
 

it only happens everynow and again when i put it in reverse i dont know if its cai again because it became loose a while back but its still tight so i don't know it really only happens 1st time u get in it to go somewhere

What does your car have? Is it auto, manual? What was loose?

auto but nothing is loose that i can tell

So its not an engine knock, just something in the engine bay?

is it like a clank or something ?

pretty sure not the motor becoouse u olny here it reverse and it doesn't alsways happen but its a knocking type of sound on passenger side from what i can tell but u know it could sound like its on that side but may be on the other because the car has to be moving to hear it so i dont know if its the tranny or something just loose