sound of knocking rods coming from under car

Thats going to be tough to answer without hearing the noise. If you feel it is safe to drive you can come by for a courtesy test drive and we will be able to give you an idea what it might be. Greg

Could be a # of things, but if you would like someone to take a look at it for free we would love to help you out. Give us a Call at (877)382-0815