Whats this part?

[BurnoutNova]

i just bought my truck...and noticed when i go down the road, the steering wheel has to much play. first i think... sloppy gearbox, but no...its been replaced like a month ago. the i look underneath. the slop is from the "big" tie rod connecting the steering arm to the spindle, on the drivers side. whats it called? i think it need replaced, i did grease it when i was down there, and it did get better, but its still to sloppy. another question, whe i get the new one on...will it need an alighnment? i know it would if i did tie rods but i think those are good for right now.

thanks, zach