This week on The Best of Car Talk, Tom's Pathfinder needs new shocks, and given that he's about to embark on a road trip with his mom, girlfriend, and dog, he'd better buy the right ones. Elsewhere, Alan's undercover surveillance work has been a bit compromised by his over-active windshield wipers. Also Carolyn's husband insists on treating their automatic transmission as if it's a stick shift; a ton of clay may have been too much for Charlie's Explorer to carry; and Bill tried to use his daughter's tights to replace a broken serpentine belt, but they flew apart. Were they the wrong size? The wrong color? And would Tom and Ray have done better as hairdressers than mechanics? All this and more, this week on The Best of Car Talk.