Join Date: May 2010
Location: North Battleford,sask
i thought a 9" was a 9" but.............
Another fairly common 9-inch case is the "WAR" casting, with two 12- and 6-o'clock ribs, very similar in appearance to the smaller '67-and-up 8-inch case, and the heavy-duty 9-inch "N" case. The "WAR" case doesn't employ the high nodular-iron witnessed with the C7AW-E case mentioned earlier. The "WAR" case pinion pilot support doesn't have as much iron either, making it more prone to failure. The "WAR" case is more common with the earliest 9-inch axles from '57-'65. The C7AW-E single-rib case is common from '67 and up, making it more plentiful. have also seen the single-rib casting with different numbers--C1AW-C, C4AW-A, and C4AW-C--indicating an early '60s origin. This makes the C7AW, C1AW, and C4AW single-rib case quite common.
There is also the "WAB" case, which is similar to the "WAR" case in appearance. Where the "WAB" case differs is differential side bearing size (3.063 inches in diameter). The "WAB" case isn't shown here. The most common 9-inch differential side bearing size is 2.892 inches in most applications.