George, Cub Cadets used 16/36, 17/35, or 19/33 tooth second gears, depending on the the model, and I believe the Cub used 16/36 or 17/35, , tooth gears (and maybe others) depending on the serial number. The Cub Cadet in the picture is a so call Original, or first model, and it had a brake drum and band brake on the left rear axle, that was the same basic drum (different size hole for the axle) and brake band as the Cub , like the author stated. Beginning with the next model Cub Cadet (70/100) the brake became a wet brake in the gear reduction housing on the front of the transmission like you said. The transmission case is the same basic case, and the early Cub Cadets still had the "fill to" plug on the left side of the case even though the Cub Cadet required 7 pints of oil/Hy-Tran. They had thier own "fill to" on the right side of the gear reduction housing, and the owners manual reminded you not to use the one on the left side.