In 1992 General Motors opted to sell off a portion of its factories, with five of them purchased and put into production under the new company title of American Axle and Manufacturing. What had previously made GM parts now makes a large variety of axles and components found in many vehicle makes and models. AAM axles are now found in everything from the Chevy Colorado and Silverado to the Ram 2500, 3500, and Power Wagon. AAM also makes disconnectable sway bars like those in the Wrangler and Power Wagon, oil pans, and transfer cases, as well as other powertrain, drivetrain, driveline, and chassis components.
This month check out what is found in the front of Ram (Dodge) heavy-duty trucks, and next month we’ll concentrate on the rear AAM axle options. The AAM 91⁄4-inch front is most common under Ram 2500/3500 trucks, but it is also found in an IFS version under GM 3⁄4- and 1-ton trucks. We spent a few days upgrading to some stronger, more efficient components from Dynatrac, ARB, and Carli suspension.
Power Wagon Axles
If you are thinking a set of AAM axles might be right for you, let us also remind you that Mopar offers new Power Wagon axles as well. These axles have a 91⁄4 front ring gear and 101⁄2 rear, both with 4.56:1 gearing and selectable locking differentials. The axles come with all factory brackets for a front four-link with track bar and rear leaf spring suspension as well as disc brakes front and rear and an 8-on-61⁄2 wheel bolt pattern. These are available from your local Jeep/Dodge/Ram dealership’s parts department (front, PN P5155087AB; rear, P5155088AB). They retail for roughly $7,400