I own a fleet and have had some bad luck with a couple of mack rb 1999 electrical wanted to know whats the truck model that least breaks down and takes a lot of hard rough work a strong car I can only buy around the 1994 -2000 range cause of my budget. Please help . I own a DM is done pretty good just would like some suggestions buying a new fleet soon.

also is it normal for trucks to be breaking constantly or a good trucks should be a ble to take a beating before it eventually needs fixes??

Thank you