[boostedc10]

The operating angle between the first and second joint is too high. You should try to be no more than 3* difference between 2 shafts. Currently you have 11* (6*+5*) at the second ujoint. Your first joint is operating at 5* (1*-6*) so your operating angle between the first and second ujoint is 6* (5*-11*). As stated above me you need to bring the tailshaft of the transmission down more (Around 5*) to take some of the angle out of the first shaft. This will in turn allow you to lower the operating angle between the first and second shaft. It will correct both the bearing issue and u joints getting chewed up way to often. Because the second and third joint had operating angles within a degree of each other would explain why no vibration was likely felt.