The 155mm GMC M40 used the HVS suspension system, and spare track blocks for the T84 tracks are stowed on the hull front on each side of the gun travel lock. The drivers' cupolas can be seen above the spare track. The late-production Sherman features include the single-piece, sharp-nosed final drive and differential cover. Although the vehicle is wider than the Sherman tank, note that the final drive and differential cover is the same, leaving a space between it and the tracks.
This rear view shows the large stabilizing spade that steadied the vehicle during bombardment. A working platform for the gun crew is folded up behind the spade; this came down over top of the spade when the vehicle was ready to fire.
The engine is shown here installed. The vehicle is facing to the left, and the rear of the driver's cupola and the ventilating blower situated between the drivers can be seen on the left of the image. (Picture from TM 9-747.)
An exploded view of the engine's clutch and fan assemblies is shown here. (Picture from TM 9-747.)
Parts of a steering brake are labeled in this image. (Picture from TM 9-747.)
A horizontal volute suspension spring bogie and the different types of return roller are diagrammed here. The road wheels were 20.5" (52.1cm) in diameter, while the dual and single support rollers were 13.5" (34.3cm) and 10" (25cm), respectively. (Picture from TM 9-747.)
The sights for the 155mm GMC M40 and 8" HMC M43 were the same except for the direct-firing telescopes, which featured different internal reticles for their respective ordnances. (Picture from TM 9-747.)