Early model driveshafts are tubular, with two U-joints that are enclosed by housings and boots, which contain the lubricant.
Later models are equipped with Spicer driveshafts, which have conventional Cardan type U-joints attached with U-bolts. A shear pin is used in these shafts. The Spicer shaft has no slip splines to provide for-and-aft movement. Spacers are used to correctly position the center bearing.
To remove the driveshaft, matchmark the U-joints and flanges and unbolt and remove the driveshaft. Installation is the reverse of removal.