WESTERN STAR 4964F TRUCK WITH DETROIT SERIES 60 ENGINE, 515HP, 18 SPEED FULLER RTLO18918B TRANSMISSION, 14600/46000 LBS AXLES, 46000 LB ROCKWELL DIFFERENTIAL, FULL LOCK, AIRLINER SUSPENSION, SINGLE FRAME, 55" SPREAD, 243" WHEELBASE, CA IS 156" WITHOUT BED AND 123" WITH BED. 4.30 RATIO.