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131 1302 04 Big Behind Aam 11 1 2 Axle

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The GM and Dodge version of the AAM 111⁄2 is very similar, using the same ring gear and carriers, but they are not 100-percent interchangeable due to suspension mounting brackets and axleshaft lengths. The AAM 111⁄2 is a massive rearend and often overkill for a trail rig, unless you are running huge power or giant tires to deal with the low ground clearance.