Panther F, I didn't include the air cleaners in my response, but air cleaners were very much in place on the A3. The two pots at the upper corners on the exhaust area of the rear plate are wet air cleaners. They contained 2 quarts of OE-30 in the bottom pan which filtered the air to the carbs. The oil pan is held in place by 4 wire brackets held by wing nuts , or in case of many that were lost, 9/16 nuts and flat washers. Oil had to be changed every couple days in a dusty or sandy environment, which meant on later or E8 Shermans, unlatching the heavy muffler baffle plate which was hinged at the top and swinging it out to get to the cleaners. Some had dual baffle plates, other had one single plate which was very heavy, requiring a two man effort swinging it back into place. In later Easy 8s, the cleaners were fitted closer to the body to make room for the baffle plate(s). As of the M-26, 46, 47 and through the M-48s, & M-41, the air cleaners were inside the turret against the engine firewall which made them easier to service, and the M-60 (and M-48A3 &A5) series had dry air cleaners on the track guards (fenders). M-4A1s had them at the rear also however I have no idea where the air cleaners were on A2 or A4s. I have heard that a few post korea Easy 8s were modified with the air cleaners moved inside the turret, but have never seen one and can't see where, in that cramped turret, where they would be made to fit.