Review on Dorman 31067 Leaf Spring Insert by Christopher Bates

Ever since I bought this truck last July, I've been tracking that knock at the rear when you hit a bump at an angle. I checked everything, then it turned out that there were no spring leak isolators on a sheet of metal on the driver's side. I set them up (about 30 minutes with a pry bar, 3 lb sledgehammers and a large leaf splitting wedge) and haven't heard the noise since. $10 well spent!