If you're this far into it you might as well finish it. A c-clamp might work or you might be able to jack it up from under the lca and hammer the balljoint down in then tighten it. Good luck with it!

 

when I raise the lower control arm up it slides into place but I can't tighten it cause it just spins threads and all.pop off off good just now it doesn't seat tight so I can tighten the nut.I should left it go, now what else can I do to tighten it

 

Don't know if it will work but what if I slowly lower Lower the truck onto rotor and see if the weight would hold the bj into place so could tighten the nut? Don't know what else to do!

 

block of wood under rotor. try it.

or heavy rope around both a-arms. and tighten with a pry bar.

 

I added a pic, i can get the bj in with my hand but slides back out, doesnt seat- just in there, i can use my finger from unneath and push it out.and thats compressed. the unit just spins,the nut is on but but no tention to hold it in place from spinning. dont know if im explaining it right.see in the pic, i put it in place but it doesnt seat just slides back out.its actually very easy to slide in...just cant tighten, nut and threads spin.

 

I even tried to use vise grips before the threads start to hold it into place so i could tighten. but not enought force, vise just popped off.

 

I explained exactly how to fix that on here and in a private message. Read them over again, i did the same thing on both sides when I rebuilt my front end

 

I did read your pm "quote" pull the ball joint in place and start to thread the nut on. then put another jack under the lower control arm and slowly pump it up to force the steering knuckle up onto the ball joint. once the knuckle is tight on the ball joint hammer down on the top to seat it in. leave the jack under it and try to tighten it after all that "quote"



First the nut is not off, i did put a jack under the lower control arm and i did pump the jack up but the steering knuckle didnt need forced onto the ball joint, just slid on- wont snug in.something must be wrong, cause i dont need a hammer, cause there is nothing to seat in, i can use my hand to hold the bj up against the knuckle.... oh well, i'll have to figure something out.. but thanks everyone for the feedback..

 

It doesnt matter if the nut is on or not, just use a jack under the lca to force the knuckle up onto the uca. if that isnt enough to hold the balljoint then smack it down with a hammer. this is very simple stuff, or you can use a ratchet strap or two to hold the control arms together and force the balljoint into the knuckle

 

I know exactly what you mean catawissarocket.
I used an impact air tool and that spins the nut on so very fast that it literally pulls the upper BJ down and into the steering knuckle.
If you have access to air tools, try using that.
If not, definitely using a heavy duty truck ratchet strap and pull the steering knuckle and upper BJ into place might work.
Being a tapered fit, when there's sufficient pressure on the Balljoint, it only takes a little pressure on the taper to stop the it spinning so you can get the nut snugged up.
Don't forget, torque that nut to the correct specs and if it's a 1500 model truck, it's + 90 degree turn extra, after the final torque.
Hope this helps?
Al.