I've been having some issues with vibration in first and second gear, so today I took the driveshaft out, marked it, and was able to get one u-joint in. I wanted to see if the front yoke that can slide out was aligned correctly. I found one arrow on the other half of the driveshaft, but no arrow on the yoke. There is a bunch of indents in a row on both sides of the shaft. Does one simply line it up as best possible by keeping them in the same plane, or simply just put the sliding portion of the yoke back in after the u-joint is installed? I'm probably overthinking it, but it's not making sense to me. Thank you for sharing your knowledge with me.