M4A1(76)W - Upgraded with 76 mm M1 gun and large drivers' hatches.
M4A2 - Diesel-powered with General Motors Twin G-41 Engine; 75mm cannon. Users: USSR, Britain (Sherman III), France, Poland, US (mainly USMC). Later production units of the M4A2 used the modified 47° glacis with large drivers' hatches. M4A2 performed very well in hot climates, used by USMC in Pacific Theater of Operations (PTO).
M4A3 - Ford GAA V-8 engine. 75mm / 76mm cannon.
M4A3E8 "Easy Eight" - Upgraded with widetrack Horizontal Volute Spring Suspension (HVSS), fitted with the 76mm high velocity cannon.
Wet (W) - ammunition stowage was moved to the hull floor, with water jackets surrounding each stowage bin. Wet stowage reduced the chance of fire after a hit to about 15%.
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