Western Star 49X Tri Drive Mid Mount 5th wheel Changelog 1.3 Fixed missing accessories and hood placement. Please comment on this mod if you find any additional errors Fixed hoods for modded chassis This mod adds a Day Cab, Day Cab Long, 48″ and 72″ Sleeper mid mounted 5th wheel 8×6 Tri Drive chassis to the Western Star 49x. Both SFA and SBA configurations are supported. All standard accessories are usable with these chassis. These chassis are not compatible with Container or Livestock trailers due to their king pin being too close to the landing gear resulting in clipping of the truck chassis.