sentences:  The M47 and M59 dump trucks were developed, based on a shortened 166 inch wheelbase M44 and M45 chassis respectively.An improved dump truck based on the full length 178 inch wheelbase M45 chassis, designated the M342, was designed to replace both the M47 and the M59, as well as the M135-based M215.Also under the M45 chassis was the signal corps V-17 pole derrick, and the V-18 auger truck, later replaced by the M35 upgrade below.