Why do Toyotas rust so bad?

the main reason 79-88 toyota beds rust is because of the two piece design, water dirt and salt get between the two and the cancer begins, as for the frames, toyota has a boxed in frame which makes getting the mud and salt out very difficult which causes them to rust from the inside out, most american trucks have an ...Why couldn't Toyota ever get it right? (rust) - YotaTech Forums