How do you split the Lower ball joint to replace it

The lower ones will wearout first,

You can probably press it out using the tool - it usually take yet another tool to press it back in.
Now many store (rockauto for sure) has the lower control arm AND new ball joint for $27 -
http://www.rockauto.com/
RockAuto Parts Catalog

For your problem,check out this few help links.

Click the link below to go through its procedure:----Upper Ball Joints inspection and replacement? http://howtobyme.blogspot.in/2012/02/upper-ball-joints-inspection-and.html------- How to Test Upper and Lower Ball Joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-lower-ball-joint.html------- How to inspect Upper and Lower Ball joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-lower-ball-joint.html------ How to Service Ball Joints on Car? http://repairhelpcenter.blogspot.com/2011/12/how-to-service-lower-ball-joints-on-car.html----------- How to Replace Ball joints? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-lower-ball-joints.html--------- Lower Ball Joints replacing on Mitsubishi car? http://howtobyme.blogspot.in/2012/02/lower-ball-joints-replacing-on.html
-------------These details will help.For more help,keep updated,with car brand,model and year.Thanks.Helpmech.

For ball joints issue.Before replacing it,first inspect and test the ball joints to confirm the problem:----Click the help links below to troubleshoot the problem and replace the ball joints:----Upper Ball Joints inspection and replacement? http://howtobyme.blogspot.in/2012/02/upper-ball-joints-inspection-and.html How to Test Upper and Lower Ball Joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-lower-ball-joint.html How to inspect Upper and Lower Ball joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-lower-ball-joint.html How to Service Ball Joints on Car? http://repairhelpcenter.blogspot.com/2011/12/how-to-service-lower-ball-joints-on-car.html How to Replace Ball joints? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-lower-ball-joints.html Lower Ball Joints replacing? http://howtobyme.blogspot.in/2012/02/lower-ball-joints-replacing-on.html----------This will help.Thanks.

Click this help links below to go through its complete replacing procedure :-----Upper Ball Joints inspection and replacement? http://howtobyme.blogspot.in/2012/02/upper-ball-joints-inspection-and.html How to Test Upper and Lower Ball Joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-lower-ball-joint.html How to inspect Upper and Lower Ball joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-lower-ball-joint.html How to Service Ball Joints on Car? http://repairhelpcenter.blogspot.com/2011/12/how-to-service-lower-ball-joints-on-car.html How to Replace Ball joints? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-lower-ball-joints.html Lower Ball Joints replacing on car? http://howtobyme.blogspot.in/2012/02/lower-ball-joints-replacing-on.html

Always use original parts instead of aftermarket products.Original parts cost bit extra,but they are exact fit and last longer.Click this link below to troubleshoot the issue :----Upper Ball Joints inspection and replacement? http://howtobyme.blogspot.in/2012/02/upper-ball-joints-inspection-and.html How to Test Upper and Lower Ball Joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-lower-ball-joint.html How to inspect Upper and Lower Ball joint? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-lower-ball-joint.html How to Service Ball Joints on Car? http://repairhelpcenter.blogspot.com/2011/12/how-to-service-lower-ball-joints-on-car.html How to Replace Ball joints? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-lower-ball-joints.html Lower Ball Joints replacing on car? http://howtobyme.blogspot.in/2012/02/lower-ball-joints-replacing-on.html
---------This will help.Thanks.

I have a 2002 Escape. The front lower ball joint is integrated into the lower control arm. You will need to replace the control arm. The good news is that the control arm is fairly inexpensive $30-50(?). I found the dealer had the lowest cost (weird).

You have to safety lift the car and get the tire off the ground.
Remove the tire/wheel, to get some room and light.
You need to remove the the ball joint connection first.... it's usually the hardest.
Remove the cross bolt and nut from the ball joint at the knuckle.
You may need to spread the "split" a little with a big chisel and hammer.
The ball joint stud needs to slide out of the knuckle.
Remove the other two connections to the "frame".
Here's a picture outside the car:

jack up vehicle, remove wheel, remove split pin from hub nut, remove nut, remove lower ball joint nut & separate ball joint, lever lower arm down, pull hub forward while pushing cv joint in wards through hub, remove cv gaiter clips and slide back on shaft, hold shaft firmly and knock cv joint off with hammer, pack new joint with grease, and place on shaft with nut on threads carefully knock on with hammer, re-fit parts in reverse order

you need a ball joint press if you have the split I beams

the upper or lower ball joint is bolted into lower control arm or upper control arm
to remove from knuckle possibly has split pin to remove first before undoing nut. leave nut on ball joint (finger loose) but so you cant see any thread from shaft and use ball joint splitter to seperate or hit side of knucle with ball peine hammer to jolt tapper shaft of ball joint loose from knucle(dont hit to of ball joint shaft)then to remove nut you have to lift top arm & or knuckle to get between driveshaft