Had new lower ball joints installed and front end aligned on 02 Trailblazer 2wd. Steering is stiff now and wheel will not self center. What could be problem?

could be the pressure valve in the steering pump
was the pump replaced ?

are you running stock tires and rims /mags
after market mags
lowered at all

was the steering wheel centered during the wheel alignment

tire wear is a method of diagnosing an alignment problem
abnormal wear on the insides or out sides of the tread indicates a problem with toe in/out and or camber settings
wheel wobble at speed ( 20 mph up ) indicates castor setting problems
steering wheel not self centering after turns indicates castor settings
steering wandering on the road indicates worn steering /ball joints and or alignment settings out
car running sideways ( crabbing)on the road indicates worn rear suspension parts , broken center bolts on leaf springs ,and rear alignment problems which will affect front end alignment
this is indicated by the steering wheel position off center when driving straight ahead

Lower Control Arm Ball Joint Replacement Removal Procedure Tools Required J 43828 Ball Joint Separator

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
3. Remove the stabilizer shaft link. Refer to Stabilizer Shaft Link Replacement .
4. Remove the wiring harness from the lower control arm.




5. Remove the cotter pin (1) from the ball joint (3).
6. Remove the nut (4) from the ball joint (3).



Notice: Use only the recommended tools for separating the ball joint from the knuckle. Failure to use the recommended tools may cause damage to the ball joint and seal.

7. Remove the ball joint from the steering knuckle using the J 43828 .




8. Remove the lower control arm front (1) and rear (4) mounting bolts.
9. Remove the lower control arm (1) from the vehicle and place in a vice.
10. Drill out the 3 rivets (3) retaining the ball joint to the lower control arm (2).
Use a 3 mm (1/8 in) drill bit in order to make a pilot hole through the rivets.
Finish drilling the rivets with a 13 mm (½ in) drill bit.

11. Remove the ball joint (4) from the control arm (2).

Installation Procedure

1. Install the ball joint (4) into the control arm (2).
2. Install the 3 ball joint bolts (3) and the nuts (1). Follow the instructions in the ball joint kit. Tighten the ball joint bolts (3) according to the specifications in the instructions.




3. Install the lower control arm (2) to the front suspension support (1)
Notice: Refer to Fastener Notice in the Preface section.

4. Install the lower control arm front (5) and rear (4) mounting bolts.
Tighten • Tighten the front bolt to 107 N·m (79 lb ft). • Tighten the rear bolt to 110 N·m (81 lb ft).



5. Install the lower ball joint stud (3) to the steering knuckle (2).
6. Install the ball joint stud (3) through the steering knuckle (2).
7. Install the ball joint nut (4).
Tighten
Tighten the ball joint nut to 55 N·m (41 lb ft) plus 180 degree rotation minimum-65 N·m (50 lb ft) plus 180 degree rotation maximum to install the cotter pin.

8. Install the wiring harness to the lower control arm.
9. Install the cotter pin (1).
10. Install the stabilizer link to the lower control arm. Refer to Stabilizer Shaft Link Replacement .
11. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
12. Inspect the front wheel alignment. Refer to Wheel Alignment Specifications in Wheel Alignment.

Hi.




1. Raise and support vehicle.
2. Remove tire and wheel assembly, then install modified outer seal protector No. J34754, or equivalent, Fig.3 .
3. Remove lower ball joint cotter pin and nut, then loosen ball joint from steering knuckle using tool No. J-29330, or equivalent.
4. Position a suitable pry bar between suspension support and lower control arm and separate lower ball joint from steering knuckle. On some models, it may be necessary to remove nut attaching link to stabilizer shaft.
5. Locate center of rivet body and mark with a center punch.
6. Using a 1/8 inch drill, drill pilot holes completely through rivets. Using a 1/2 inch drill, drill final holes through rivets to ensure fitting of new ball joint.
7. Remove ball joint from lower control arm.
8. Assemble new ball joint to lower control arm with bolts provided in service package, Fig.9 . Tighten bolts to specifications.
9. Insert ball joint stud into steering knuckle and tighten nut to specifications, then install cotter pin.
10. Install wheel and tire and check front wheel alignment.

I hope this helps you.

Thanks.

Ball joint mave have been moved causing bad alignment you are discussing. Go get alignment to correct the issue and get a free inspection of your parts in the process.

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

Removal & Installation NOTE This procedure requires the use of the following special tools: J 9519-E Lower Ball Joint Remover and Installer, J 34874 Booster Seal Remover/Installer, J 41435 Ball Joint Installer, J 45105-1 Ball Joint Flaring Adapter and J 45105-2 Receiver.

1. On 4WD vehicles, remove the wheel center cap and drive axle nut.
   
2. Raise and support the vehicle.
   
3. Remove or disconnect the following:
   
   • Tire and wheel
     
   • Wheel hub and bearing, if necessary
     
   • Outer tie rod retaining nut
     
   • Out tie rod from the steering knuckle using a suitable puller
     
   • Brake hose bracket retaining bolts and bracket
     
   • Upper control arm-to-steering knuckle pinch bolt and nut
     
   • Upper control arm from the steering knuckle
     
   • Lower ball joint retaining nut
     
   • Steering knuckle from the lower control arm using a suitable ball joint removal tool
     
   • Steering knuckle from the vehicle
     
   • Lower ball joint flange with a chisel
     
4. Install tools J 9519-E and J 34874 to the lower ball joint, then use those tools to remove the lower ball joint from the lower control arm.
   

To install:

1. Install or connect the following:
   
   • Lower ball joint to the lower control arm, using tools J 9519-E, J 41435 and J 45105-2
     
2. Remove the tools from the lower control arm.
   
   • Tools J 9519-E and J 45105-1 to the lower ball joint
     
3. Flare the lower ball joint flange with J 9519-E and J 45105-1, then remove the tools from the lower ball joint.
   
   • Steering knuckle to the lower control arm
     
   • Lower ball joint retaining nut and tighten to 81 ft. lbs. (110 Nm)
     
   • Upper control arm to the steering knuckle
     
   • Upper control arm pinch bolt and nut and tighten to 30 ft. lbs. (41 Nm)
     
   • Brake hose bracket to the steering knuckle
     
   • Brake hose bracket retaining nuts and tighten to 7 ft. lbs. (10 Nm)
     
   • Outer tie rod to the steering knuckle
     
   • Outer tie rod retaining nut and tighten to 33 ft. lbs. (45 Nm)
     
   • Wheel hub and bearing, if removed
     
   • Tire and wheel
     
4. Lower the vehicle
   
   • Drive axle nut, if 4WD, and tighten to 103 ft. lbs. (140 Nm)
     
   • Wheel center cap, if removed
     
5. Check the front wheel alignment.
   

here is a step by step instructions on how to replace your bearing. please copy and paste the link into your browser for an image.

please do not forget to rate and comment about your experience with fixya today.

Removal & Installation

1. Apply the brakes and hold in place.
   
2. Raise the vehicle.
   
3. Remove the front tire and wheel assembly.
   
4. Remove the cotter pin, lock nut and spring washer from the hub nut.
   
5. While the brakes are applied, loosen and remove the hub nut on the end of the driveshaft.
   
6. Release the brakes.
   
7. Remove the front disc brake caliper and adapter as an assembly, and the brake rotor from the steering knuckle.
   
8. Remove the nut attaching the outer tie rod to the steering knuckle. To do this, hold the tie rod end stud with a wrench while loosening and removing the nut with a standard wrench or crowfoot wrench.
   
9. Remove the tie rod end from the steering knuckle using Remover, Special Tool MB991113.
   
10. Remove the tie rod heat shield.
    
11. Remove the nut and pinch bolt clamping the ball joint stud to the steering knuckle.
    
    CAUTION The strut assembly-to-steering knuckle attaching bolts are serrated and must not be turned during removal. Hold the bolts stationary in the steering knuckles while removing the nuts, then tap the bolts out using a pin punch.
    
12. Remove the two bolts attaching the strut to the steering knuckle.
    
    NOTE Use caution when separating the ball joint stud from the steering knuckle, so the ball joint seal does not get cut.
    
13. Separate the ball joint stud from the steering knuckle by prying down on lower control arm and up against the ball joint boss on the steering knuckle.
    
    NOTE Do not allow the driveshaft to hang by the inner C/V joint; it must be supported to keep the joint from separating during this operation.
    
14. Pull the steering knuckle off the driveshaft outer C/V joint splines and remove the steering knuckle.
    
    NOTE The cartridge type front wheel bearing used on this vehicle is not transferable to the replacement steering knuckle. If the replacement steering knuckle does not come with a wheel bearing, a new bearing must be installed in the steering knuckle. Installation of the new wheel bearing and hub must be done before installing the steering knuckle on the vehicle.
    
15. If the wheel bearing and hub need removal. Do not reuse the wheel bearing.
    http://www.chiltonlibrary.com/content/images/32050/images/32050_ptcr_g0035.gif The separation of the ball joint and the knuckle
    

To install:

1. Slide the hub of the steering knuckle onto the splines on the driveshaft C/V joint.
   
2. Install the steering knuckle onto the ball joint stud aligning the bolt hole in the knuckle boss with the notch formed in the side of the ball joint stud.
   
3. Install a new ball joint stud pinch bolt and nut. Tighten the nut to a torque of 70 ft. lbs. (95 Nm).
   
   CAUTION The strut assembly-to-steering knuckle attaching bolts are serrated and must not be turned during installation. Install the nuts while holding the bolts stationary in the steering knuckle.
   
4. Position the lower end of the strut assembly in line with the upper end of the steering knuckle and align the mounting holes . Install the two attaching bolts. The bolts should be installed with so that the nuts face towards the front of the vehicle once installed. Install the nuts. Holding the bolts in place tighten the nuts to a torque of 40 ft. lbs. (53 Nm) plus an additional 90° turn after the specified torque is met.
   
5. Place the tie rod heat shield on the steering knuckle arm so that the shield is positioned straight away from the steering gear and tie rod end once installed. Align the hole in the shield with the hole in the steering knuckle arm. Install the outer tie rod ball stud into the hole in the steering knuckle arm. Start the tie rod attaching nut onto the stud. Hold the tie rod end stud with a wrench while tightening the nut with a standard wrench or crowfoot wrench. To fully tighten the nut to specifications, use a crowfoot wrench on a torque wrench to turn the nut, and a wrench on the stud.
   
6. Tighten the nut to a torque of 40 ft. lbs. (55 Nm). Install the brake rotor, disc brake caliper and adapter.
   
7. Clean all foreign matter from the threads of the driveshaft outer C/V joint. Install the hub nut in the end of the driveshaft and snug it.
   
8. Have a helper apply the brakes. With vehicle brakes applied to keep brake rotor and hub from turning, tighten the hub nut to a torque of 180 ft. lbs. (244 Nm)
   
9. Install the spring washer, lock nut and cotter pin on the hub nut. Wrap the cotter pin ends tightly around the lock nut.
   
10. Install the tire and wheel assembly. Install the wheel mounting nuts and tighten them to a torque of 100 ft. lbs. (135 Nm).
    
11. Lower the vehicle.
    
12. Set the front toe on the vehicle to required specification.
    

1.It isn't a lower or upper ball-joint, lower ball-joint, nor tie-rod end. A lower ball-joint being bad, would make the front-end shake. Upper ball-joint, and tie rod ends being bad, would make steering erratic.

Sounds more like the problem is in the steering box. In all actuality, it almost sounds like the power steering pump wasn't changed. Are you sure it's a new, known, good pump?

1. Remove the steering knuckle with wheel hub and bearing attached.
2. Remove the lower ball joint flange with a chisel.
3. Install J9519-E and J34874 to the lower ball joint.
4. Remove the lower ball joint from the lower control arm using J9519-E and J34874

1. Install the lower ball joint and J9519-E, J41435, and J45105-2 to the lower control arm.
2. Install the lower ball joint to the lower control arm using J9519-E, J41435, and J45105-2.
3. Remove J9519-E, J41435, and J45105-2 from the lower control arm
1. Install J9519-E and J45105-1 to the lower ball joint.
2. Flare the lower ball joint flange using J9519-E and J45105-1.
3. Remove J9519-E and J45105-1 from the lower ball joint.
4. Install the steering knuckle with wheel hub and bearing attached. Install the tire and wheel.
1. Lower the vehicle.
2. Check the front wheel alignment.

these jouints are pressed in and there is a flange that is flared this is what the tool numbers refer too.