Abstract: A transmission housing, or transmission including a transmission housing, having a plurality of dipstick access ports positioned on the housing for receiving in each access port a dipstick that is used to monitor a level of transmission fluid in an oil pan mounted to a bottom of the transmission housing. The housing may also include internal lugs positioned along an internal surface of the housing that interlock or interconnect with a transmission component to minimize rotational movement of the component relative to the housing. The lugs are aligned and spaced equidistance apart circumferentially on the internal surface of the housing, thereby eliminating larger gaps between consecutive lugs, which may concentrate mechanical stresses on the lugs at such a gap, as in prior art transmission. In addition, the housing may include an inlet fluid port positioned adjacent the lugs for receiving cooled transmission fluid to lubricate and cool centrally and rearwardly positioned transmission components.