With the rear of the frame back in order, it was time to install the new rear crossmember. From the factory, the crossmembers were installed with rivets. When ordering remanufactured crossmembers from Walck’s 4 Wheel Drive, new rivets come in the box. Some assembly is required, of course. The first step was to heat the new rivet cherry red. When it begins to spark, it is ready to be smashed into place.