Stock rear axles of MBs and GPWs consist of a full-floating Dana 25 rear with 4.88 gears. The full-floating axle was a great idea; the differential interchanged with the Dana 25 front axle, which all the flatties used. But snapped rear axleshafts were common because the diameter was too small for rough service. The two bolts (arrows) are used to take out the axle once the retaining bolts are removed. The hub was flat under these bolts, so screwing them in would force the axleshaft out for removal.