I'm looking the change the rear shocks on my 2001 Jeep Grand Cherokee. I was more worried about loosening the top bolts but both came loose easily. I could not budge the bottom bolts. I'm trying to find new bolts and nuts for the bottom before I get too sassy with them and round them off. Does anyone know what size bolt and nut they are? Napa is closed so I called Pep Boys and Advance...with no luck. Thanks in advance.