I have a 1998 Chevrolet S10 rear wheel drive with drum brakes on the rear and disc in front. My truck recently failed inspection because I put the rear shoe in the front and the front shoe in the rear the mechanic said. I have taken off my shoes and I can't tell the difference. And I didn't take a picture before removing them. How can you tell which shoe belongs where since they will go on backwards (I assumed they would only go on one way)?