

The AW4 offers a good four-speed overdrive transmission conversion into post-'79 Jeep CJ's where an AMC 4.0L swap is being performed. No adapter is needed for the 23 spline output AW4 to the STaK Monster Box. Currently we don't have an adapter to mate to the 21 spline AW4. We are working on making one and hope to have it out soon.