we have a new Thomas safteliner with about 8000 miles on her .A couple nights ago the driver came in after a run and said it smelled hot . I wasn't here but the boss called me and told me about it . So today I come in and bring the bus in to check things out . The R.R. brake was locked up . So I back the adjuster off a couple clicks and that fixed the problem for now . These are automatics and wondered why it was so tight ? I have had automatics not keep up but not the other way around . Do I need a new adjuster ? Thanks