ball joints seat themselves?

sorry, i know this is in the wrong section, but i need an answer quick. i'm working on a large delivery truck and just replaced the lower ball joint. it gets pressed in from the bottom. i got it all the way in except for about 1/4-3/8" and was wondering if i had to get it completely in or if the weight of the vehicle back together would set it completely in while driving. if i had to do it myself, how would you recommend getting it completely on? thanks alot!

you have to use a balljoint press to get it the rest of the way in. I don't recommend trying to see if it'll set itself the rest of the way

I knew a guy who tried that..let's just say it didn't turn out so good.

thanks for the info guys. i didn't know about the ball joint press. got it on the rent a tool program at autozone. worked perfectly!