Thomas bus is a Frieghtliner Subsidiary.... They bought the Thomas line in 1990 or 91 I'm not 100% sure which year it was. Even the older Thomas like my 89 still has mostly Frieghtliner chassis parts. I found this out one day when I went to Sonny Merriman for parts, and he told me his 'Access Frieghtliner" was down...I work for a Sterling dealer which is also a Frieghtliner sub, and we use the same site for parts (and ours was down that day too because of some problem at Frieghtliner)...