Tuesday, November 12, 2013
What Is an AX15 Transmission
The AX15 is a five-speed, standard shift transmission made by Aisin-Warner. Although the transmission is no longer used in newer vehicles, Aisin-Warner still produces the part.
Vehicle Models
Jeep used the AX15 in its 1988 Wrangler XJ and YJ models, the Comanche and the MJ Cherokee. The transmission was standard in all XJ, YJ and TJ Jeeps from 1988 to 1999. In 1993, the AX15 came in the ZJ Grand Cherokee in the six-cylinder model.
Description
The AX15 has a cast aluminum case and mid-plate. It measures 16.5 inches in length. It is a top-shifting, overdrive transmission with a split case. All gears are synchronized and helically cut. The gear ratios are 3.83 for first, 2.33 for second, 1.44 for third, 1.00 for fourth and 0.79 for fifth. The AX15 uses a 10-spline input shaft. It has a 23-spline output shaft and uses dowel pins for bellhousing alignment.
Variations
The input shaft pilot tips were smaller in the AX15 made from 1988 to 1991. They measured 19/32 inch, while later models use a 3/4-inch tip. The 1988 to 1993 models had an internal slave throwout, which was switched to a slave cylinder with cross arm design in later years.
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