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XJ ( X308 ) XJ8 / XJR 1997 - 2003

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  #1  
Old 10-05-2012, 04:55 PM
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Default Halfshaft U Joints

Hi Guys,

Has anyone ever done, witnessed or know where I can find a DIY to replace the rear half shaft u joints on a 1998 XJ8? I'm told they are sloppy and its making it impossible to align the car. I can believe this, but I am reluctant to spend the grand that the garage wants to change them. I am willing to try this myself, but I would like to have some idea about what I am in for and if I need any special tools. (stupid question I know. Of course I need special tools. Should have had a special hammer to hit myself in the head with before I bought this thing) I'm guessing it isn't easy since the garage says 7 hours labor and they are making noises that sound like "have to remove the entire rear end as a unit...", etc.

Any and all help is appreciated. Thanks in advance.

/rick
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Old 10-05-2012, 05:37 PM
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As I'm sitting here cruising craigslist looking to dive into an XJ8 (that I don't really need, a toyota corolla will get me there just as well) I keep running into people like yourself that are kicking themselves for buying this car. From the posts on the forum it looks like it is full time job keeping these things running. Is that what you have experienced?
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  #3  
Old 10-05-2012, 06:09 PM
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I personally had not replaced them but I had 2 replaced because of the same problem. I now have a lift and would not hesitate doing the job myself. This link should help.
Link http://jagrepair.com/images/AutoRepa.../Halfshaft.jpg
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Old 10-05-2012, 06:21 PM
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DctrRoss,
I would call it a love hate relationship. It's a great car and really nice to drive when it is all working, which is most of the time. Unfortunately, when it isn't 100% it is very expensive to have it worked on. Working on it yourself requires either a long list of expensive specialized tools or some serious outside the box thinking. I've managed to do many of the things you read about in this forum, but honestly, my time is becoming more valuable to me and if this job turns out to be a nightmare, then I think I may have finally had enough. I bought the car fairly cheap, so it doesn't really owe me anything. With all of the work I have done, I can probably break even and, chaulk the time up to experience, and go buy a focus. (My wife gets A plan) One of the members on here, not sure which, has a tag line that says something like owning a jag is like owning a horse. There is no good reason unless you love taking care of it. I tend to agree, and unfortunately, I'm finding I don't have time for a horse. I don't say this to discourage you. It really is a nice car. Just be aware that an older one is going to have issues, and they aren't cheap. If I could work it out, I would like to park this one and not have to depend on it. Kind of like a horse. Then we could be friends again.
Good luck
/rick
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Old 10-05-2012, 06:27 PM
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Gus,
Thanks for the link. Looks like straight forward snap rings, like a plain old u joint. I don't have a lift, but I can get the car up on stands. I haven't really looked at it yet, just got this news today. Do you think these could be replaced without removing the rear end and all that nastyness that goes with it?
Thanks again.
/rick
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  #6  
Old 10-05-2012, 06:38 PM
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I can tell you they did not remove the rear end on my car to replace them. I recently looked at mine and would not hesitate doing it but I think it will be a little tight with the car on stands.
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  #7  
Old 10-05-2012, 06:52 PM
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This isn't that difficult if you have any familiarity with how U joints are installed. I pulled my left rear halfshaft as I had one ujoint completely out when I bought the car. It made noise when driving, but I didn't really know how bad it was until after I got the car home and jacked up the back. The rear wheel moved. A LOT. I ordered the ujoints as it was painfully obvious that the outboard one was completely out.

To remove:
(there is a pdf on the forum somewhere from JTIS showing this, it is quite good)
Remove wheel, rotor and brake caliper assembly and hang the caliper off to the side. Remove the axle nut. There is a lower pivot bolt on the bottom of the hub, it is a cammed bolt, so mark the head in place, so you can reinstall it the same way.
You might need a wheel puller to push the splined shaft out of the hub, but I just used a 3# hammer and a block of wood to cushion a little. Came right out. Pull out the pivot bolt.
There are 4 bolts that attach the inboard side of the shaft to the differential. These took me awhile to get loose, since there seems to be only one place you can get a socket in to turn them. I lowered the opposite wheel so the differential wouldn't turn while I was cranking on it. For some reason, my 98 VDP seems to have locktite on every bolt, so these took a little more time.

You will now have the driveshaft out and you can change the ujoints just like any other ujoint, they are no different at all.

The previous owner of my VDP had ignored this problem so long, that the bearing in mine was well beyond hope. In fact, I pressed the first part of the ujoint out and the ujoint was actually so worn that it had worn thru the bearing cap and starting to wear in the yoke itself. After pressing the first part out, I realized there was too much damage to fix, so I started to look for a replacement.
I found a replacement using Car-Part.com--Used Auto Parts Market to find an entire rear halfshaft, shipped to my house, for $30. I didn't know the condition of the ujoints, but I figured I had the joints, so as long as the yokes were good, I could replace the joint.
Turns out both ujoints were tight and had no wear, so I installed the shaft without having to press the new bearings in.

There is no reason this is a 7 hour job. There is absolutely no reason to drop the whole rear end. I replaced the wheel bearings at the same time and most of my time on this was getting the wheel bearing races out. Disassembly and reassembly, not including working on the ujoint itself or the wheel bearing, it probably took me a 2-3 hours tops. Reassembly went MUCH faster.

If you don't feel comfortable with getting the ujoint out, pull the halfshaft and bring it into either a machine shop or driveline specific shop and they should be able to get you going in well less than an hour.

Incidently, if you need a couple ujoints (part # JLM001388) , I happen to have a couple extra around . . .


Quote:
Originally Posted by Impulse_buy View Post
Hi Guys,

Has anyone ever done, witnessed or know where I can find a DIY to replace the rear half shaft u joints on a 1998 XJ8? I'm told they are sloppy and its making it impossible to align the car. I can believe this, but I am reluctant to spend the grand that the garage wants to change them. I am willing to try this myself, but I would like to have some idea about what I am in for and if I need any special tools. (stupid question I know. Of course I need special tools. Should have had a special hammer to hit myself in the head with before I bought this thing) I'm guessing it isn't easy since the garage says 7 hours labor and they are making noises that sound like "have to remove the entire rear end as a unit...", etc.

Any and all help is appreciated. Thanks in advance.

/rick
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  #8  
Old 10-06-2012, 07:51 AM
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pod184,
Thank you for the excellent info, much appreciated. You are right, it doesn't sound all that bad. I am going to crawl under today and check things out. I also have an appointment at at another jag garage who claims over the phone that it might be something simpler than u joints. I figured the second pinion wouldn't hurt, but i will likely determine for myself today where the issue is.

1 question.
I have looked at a post here about replacing the rear wheel bearings that mentions that the rear axle nuts destroy themselves when you remove them and that you should plan to have replacements. Did you find this to be the case?

Thanks again.
/rick
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  #9  
Old 10-06-2012, 07:55 AM
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Gus,
Thanks again for the insight. Between you and pod184 I think you may have talked me into it.
/rick
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  #10  
Old 10-06-2012, 07:58 AM
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pod184,
If I decide I do need U joints, maybe I will take those off your hands.
/rick
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  #11  
Old 10-06-2012, 10:28 AM
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Yes, plan to replace the axle nut. It will strip when removing it.

The whole process isn't technically difficult, if you can do brakes, you can do this.
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1998, float, half, halfshaft, jaguar, joint, joints, jointsm, removal, repair, serviceable, shaft, u joint, x308, xj8



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