F/liner parts catalog

When you said breakdowns, I thought you were talking about trucks breaking down, but you were talking to parts break downs. I use PartsPro and Peterbilt ECAT, both have their downfalls. The search function on both is usually worthless. ECAT is especially bad about what components are on the VIN# that you're in. I have a VIN, why do I have to tell it what year or what sleeper it came with? Why should I have to tell it what front suspension it has? It'll link right to Cat SIS for engine parts, but you have to enter the engine serial #. It should know what it was built with by the VIN. PartsPro is much better at that stuff. PartsPro is semi good at finding wiring diagrams and installation drawings by right clicking on the part. ECAT has a diagrams link that shows you a list of every drawing for the truck no matter where you are and in no sensible order either.