there is a big plug, maybe a 3/4 inch square drive head, on the back of the pumpkin that is the drain plug... on the driver side toward the front nearer to the drive shaft is a smaller plug about half way from the bottom to the top of the case. it has a 3/8 inch suqare drive hole to remove it. the small plug is the fill, the big plug is the drain hole. it does hold almost 2 quarts of synthetic 75w 140 oil and 7 ounces of the friction modifier.