Now we could bolt in the <a href="http://www.4xshaft.com/" title="" target="_blank" rel="nofollow">Tom Wood’s Custom Drive Shafts</a> 1310 driveshaft. If you’ve never done this, it’s difficult to imagine the balancing act that goes on for a few minutes underneath the rig with a heavy driveshaft in one hand and a wrench and parts in the other. Four new Spicer U-bolts were included with the new Gold Series 1310 U-joints. We made sure that the joints were properly seated in the yokes before cranking down the U-bolts. Don’t overtighten these bolts though, as too much stress on the U-joint caps could distort them and lead to premature failure.