I need to change upper ball joint on pass side 2001 seabring 2.7 4door

Looking at the factory repair manual it shows the ball joints themselves are pressed in. If you purchased an aftermarket component that bolts in I would contact that company and ask what the torque specs are supposed to be. If you are referring to the ball joint STUD nut, they are torqued in two passes. The upper ball joint to 37 Lb Ft on first pass and then final pass torque 90-110 degrees. Lower ball joint 37 Lb Ft and 125-135 degrees. See attached screenshots from manual.

Here's a YouTube video showing the procedure on the passenger side. Apparently, you can't get just the upper ball joint, you have to replace the upper control arm, but it looks to be a fairly easy project. You can skip the first three minutes of the video - the work starts at about 3:15.

Ford Explorer Pass Side Ball Joint Replacement Part 1

Old, Some times the hole control arm assembly is changed, if you can find it priced reasonably other wise yes, with proper tools the ball joint can be changed. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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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.

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

Just lower ball joints. One lower per side.

It depends on exactly which ball joint of the 3 per side your changing, but here are the details.

COMPRESSION LOWER ARM & LATERAL LOWER ARM ASSEMBLIES
Removal
1. Loosen compression lower arm ball joint nut. Using steering linkage puller, separate ball joint and
knuckle. Remove nut, bolts and compression lower arm assembly. Remove dust cover.
2. Remove stay. Remove shock absorber lower mounting bolt. Loosen lateral lower arm ball
joint and knuckle nut. Using steering linkage puller, separate ball joint and knuckle. Remove nut, bolt and
lateral lower arm assembly. Remove dust cover.
Inspection
Using preload socket, ensure breakaway torque for compression lower arm ball joint is 4-22 INCH lbs. (0.5-2.5
N.m) for 2000 models. On 2001 models, breakaway torque is 22-54 INCH lbs. (2.5-6.1 N.m). Ensure
breakaway torque for compression lateral lower arm ball joint is 13 INCH lbs. (1.5 N.m). Check compression
lower arm, lateral lower arm, dust covers, and bushings for damage and wear.
Installation
To install, reverse removal procedure. Use NEW ball joint nuts. Lubricate lip and inside of dust cover with
multipurpose lubricant. Using installer, install dust cover. Check front wheel alignment.
UPPER ARM ASSEMBLY
Removal
Using steering linkage puller, loosen upper arm ball joint and knuckle nut. Remove self-locking nut. Remove upper arm and upper arm shaft assembly. Remove dust cover.
Inspection
Using preload socket, ensure breakaway torque for upper arm ball joint is 3-13 INCH lbs. (0.3-1.5 N.m).
Replace upper arm assembly when measured value exceeds specification. Check upper arm, dust cover, and
bushings for damage and wear.
Installation
1. To install, reverse removal procedure. Use NEW self-locking nuts. Lubricate lip and inside of dust cover
with multipurpose lubricant. Using Ball Joint Installer (MB990800), install dust cover.
2. Ensure upper arm shaft assembly is installed at indicated angle. Verify upper arm shaft
assembly installation. Check front wheel alignment.

Once you have the correct arm off and a replacement joint (if available, some are not serviceable and require the arm to be replaced) then you will need a press or a ball joint press to change the joint. Such as
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=38335

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=46389

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=66958

or http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=46967

need to see if its upper ball joint or lower ball joint or strut itself use greese

Jack up the car remove wheel remove brake caliper and remove rotor rent a ball joint press remover and installer tool (at schucks you get money back when you bring it back) if it's 4 wheel drive you will have to remove the axle shaft next pull the snap ring off on the top side and put tool on the lower tie rod end and press out, next do the top press out top joint next sand ball joint sockets so it is clean lube with WD-40 next press in top ball joint and then lower ball joint. In this order otherwise you will have to un install the top ball joint by removing the pin then nut.

its easier to get the whole control arm and the lower one has to be pressed in. it is not and easy job if you dont have the right tools checkout rockauto.com to look at the replacement parts and to get a price on them