Question about 1998 Isuzu Trooper

3 Answers

How to remove the lower ball joint, trooper

What must be dissassembled to remove the lower ball joint on a '99 Trooper? The ball joint taper is broken free of the steering knuckle, but a sheet metal bulb/ring onto which the CV joint boot attaches to is in the way preventing the complete removal of the lower ball joint.

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  • tack1 Jun 29, 2009

    When I posted my questyion I already had the upper ball joint replaced. I also had the lower jount knocked loose from it's pressed-in position on the knuckle, but I discovered that it couldn't be removed because of the drive shaft. The hub has six 17mm bolts, and on the end of the hub, dust cover, there are six 8mm hex bolts. 1999 Trooper (don't know how it got posted as a '98). I've done many ball joints in the past, but not 4x4. It appears I'll be needin' to replace the outer CV boot also.

  • tack1 Jun 29, 2009

    I forgot to add, that it looks as if the 6 hex nuts and associated cover must be removed to allow a socket to be placed on the 17mm bolts; is this so? Thanks

  • tack1 Jun 29, 2009

    Yes sir, that's clear. There is the concern, though, that there may be other differences besides the ones I noted; i.e., the instructions speak of 8 15mm bolts, whereas my truck has 6 17mm bolts and 6 8mm hex bolts. Might there be a mix-up with the vehicles? Thanks

  • tack1 Jun 29, 2009

    Greetings; What must be dissassembled to remove the lower ball joint on a '99 Trooper? I have the upper ball joint replaced; anso the lower ball joint taper is broken free of the steering knuckle, but I cannot clear the lower ball joint from the vehicle since a sheet metal bulb/ring onto which the CV joint boot attaches to is in the way preventing the complete removal of the lower ball joint.
    The hub has six 17mm bolts, and on the end of the hub, dust cover, there are six 8mm hex bolts. 1999 Trooper (don't know how it got posted as a '98). I've done many ball joints in the past, but not 4x4. It appears I'll be needin' to replace the outer CV boot also. I'm reposting my question because there may've been a misunderstanding of which vehicle is involved due to a discrepency with the number and sizes of bolts.

  • tack1 Jun 29, 2009

    I figured it out; easier than it looks. Remove the six 8mm hex/Allen bolts, remove sheet-metal dust cover. Remove "C" ring retainer, then the drive shaft slipps right out of the back. Then the lower ball joint can be removed.

  • tack1 Jun 29, 2009

    Thanks; I noticed that the CV boot was split in two peices! So it has to go. Can you give me tips of replacing the outer boot? Thanks

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3 Answers

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  • Master
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Great!
Thanks for the update.
If you require additional help - feel free to leave a comment.

Thanks for using Fixya!!

Posted on Jun 29, 2009

  • 1 more comment 
  • blueextc3221
    blueextc3221 Jun 30, 2009

    Normally - once a boot goes bad - the entire shaft is replaced - as the boot must be put on the shaft before the uJoint is assembled.
    There is no way to get a new boot on.... without separating the UJoint.

    Thanks again.



  • blueextc3221
    blueextc3221 Jun 30, 2009

    SEE THIS PAGE for confirmation to change the entire shaft.

  • blueextc3221
    blueextc3221 Jun 30, 2009

    However... see this video for how to replace just the boot (if you so desire)




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  • Expert
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If the truck is 4wd , you have a torsion bar which is the spring that holds the lower cotrol arm down( holds the truck up).and with no load(jacked up) the torsion bar will also prevent the lower arm from falling to the ground. so you may have to adjust or remove the torsion bar. the shock absorber will also hold the lower arm up

after reading the procedure in the book , it is a complicated job ,but it can be done.
whatever you take apart, mark it where the parts seperate

Posted on Jun 29, 2009

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  • Isuzu Master
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U have to remove the axle assmbly to service the lower ball joints, follow these instructuions to do this
. With the vehicle stationary and the hand brake on use a 19mm socket and long bar or the vehicles wheel wrench and initially undo the 6 wheel nuts one 1/8th of a turn so to release the tightening torque.
2. Jack the car at the specified jacking point and safely support the vehicle on suitable axle stand(s).
3. Undo and remove the 6 wheel nuts being careful not to lose the washers and spring washers.
4. Remove the wheel and put out of the way. Under the car is easiest and if the axle stand does fail the car will stop on top of the wheel.
The wheel hub is now in full view.
5. On the auto hub locking mechanism there are 8 bolts that need to be undone. Use a 15mm socket and put a screwdriver into the vented part of the disk so when you undo the bolts the screwdriver will rest against the brake calliper and stop the hub from rotating.
6. When all of the bolts are undone carefully pull back the cover being careful not to lose and shims or spacers that might fall out.
7. Remove the spring clip at the end of the driveshaft and pull out the auto locking hub mechanism. Place these on a piece of card in order and orientation they come off the hub so reassembly is easier.
8. Carefully pull off the locking ring and place it next to the locking hub making sure it will go back on the way it came off.
9. There is a locking ring that is held in place by 3 Brass cross head screws this doesn’t need to be removed unless you wish to replace the brake disk as well. The ring underneath this rotates and holes the wheel bearing, turn it and it unscrews out leaving the disk etc to come away.
10. The brake calliper needs to be removed for ease of access. This is done by using a 22mm socket on two bolts on the inside of the hub. These are tight and will need a bit of effort to undo them if they haven’t been touched before.
11. The top and bottom ball joints need to be undone. A 22mm socket is needed for the top and a 24mm socket for the bottom. The split pins need to be removed and renewed.
12. To get the ball joints to come apart simply is use a club hammer and hit the hub part of the joint from both sides top and bottom. This might take a bit of time and depends on how hard you hit the hub. What this does is to shock the joints apart. Start with the top joint then move to the lower joint. Using a forked ball joint splitter is an option but they have a higher risk of splitting the ball joint rubber seal.
After a period of time the hub should be free and only connected by the steering control arm. The drive shaft should be able to be removed easily.
13. To remove the shaft completely, undo the clip holding the inner driveshaft boot to the bearing carrier. Pull the boot back and you will see a mass of black grease. If you pull the driveshaft back towards you, it will move but not come out. There is a big locking spring stopping the removal just inside the lip of the UJ socket. Use a small screwdriver to pop this clip out. The drive shaft will now be able to be pulled out.
14. If you look at the end of the shaft under the grease you will see a spring clip. Remove this and the ball race can now be pulled off.
15. Clean of all excess grease from the surfaces where the driveshaft boots (gaiters) will sit.
16. This now makes it easy to slide on the new outer boot (gaiter), repack with grease and secure in place with supplied fittings. Refit or renew the inner boot, repack with grease and refit the bearing race and spring clip.
17. Insert back into the bearing cup and fit the securing spring clip.
18. Secure the boot with the clip or supplied fittings.

Posted on Jun 29, 2009

  • yadayada
    yadayada Jun 29, 2009

    the axle must be pulled out for the ball joint access and for the CV joint replacement, thought that was clear in the instructions.

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f57-19.gif A ball joint taper. Courtesy of Moog Automotive, Inc. To remove a ball joint requires the use of a ball joint remover.
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f57-20.gif Three common ball joint retaining methods. Courtesy of Moog Automotive, Inc. Some ball joints are held in with rivets from the factory. The rivets are drilled and punched to remove them. Bolts and nuts are used to hold the replacement joint in place.
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I need to know how to replace lower ball joint in my custyomer's gmc vandura 1996 model 6.5 d 3500 series.


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Position the vehicle so that the coil spring is pushing on the ball joint. This could require lifting the vehicle or allowing its weight to rest on the wheels.
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stevenhurc_11.jpg

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Emissionwiz has asked you to clarify your question to best assist with your how to remove the lower ball joint, trooper problem: do u have the ball joint press?The ball joint is presse3d out; the problem...


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