Question about 1996 Jaguar Xj Series

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Wheel shake and brake judder

I have a 1996 Jaguar XJ 4.0lt sport which has a severe wheel shake and brake judder after 15-20 miles of driving. This does not happen when the car is cold - can you tell me what this is.

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  • Anonymous Mar 20, 2014

    my car drives ok for 10 miles then it starts to shudder and the revs drop

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When I purchased my 96 XJ6 3 weeks ago, I had the same symptoms, severe wheel wobble from the all 4 wheels at certain speeds. The is a sure sign of out-of-balance wheels, so 1 hour at Discount Tires and $32 later eliminated MOST of the problem.

After that was resolved, no more wobbling through the steering wheel, now only from the rear, especially when braking. I have not fixed this yet, but it is an indication of a warped rear rotor, possibly both, so those have to go. Need to also find out WHY the rotor(s) got warped.. possibly a previously-siezed caliper or some other issue, I will post my findings when I've found them.

Posted on Mar 20, 2009

  • JagVirgin Apr 13, 2009

    OK.. I just got through replacing the rear rotors, and the judder under braking has been completely eliminated. Brake caliper showed signs of previously being over-heated, so a good wire brushing and applying some copper-based grease (very carefully!) to the caliper slides only, should prevent recurrence of that.



    I still have a minimal amount of rear vibration at around 65-70mph, but it's much less now with the new rotors... next step will be to replace drive axle universal joints.



    BTW, I obtained brand new rotors and pads for all 4 wheels for only $163 including shipping.... don't think it's allowed to advertise the website here, but I'd be willing to reply to an e-mail.

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What speeds are you obtaining and braking

I would think that you tires are out of balanced whether it be dabre in the rim or an improper balancing job
some cars can be fine up to 40 but when you step up the speed more the more the tires become unbalanced. making the servere shakes.

Posted on Feb 13, 2009

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Iv got a jeep Cherokee 2009kk and when I'm doing 20-30 miles an hour it judders can you help thanks Leslie.


judder,
well that means vibration, and we will never know the source of that here in net bunnyland.
for example, it can be over 100 things.
top things, (all useless in the real world are)
1: engine shaking, misfire, needed a tune up.
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3: suspension bounce, shocks bad, or struts.
4: wheel lug bolts falling off, loose, danger to extreme.
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why not ask the living to inspect car and live to next day.

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Is it shaking when you are doing high speeds or low speeds? Is the steering wheel juddering as well? Are any of the wheels hot to touch? If it is I would have your brake calipers looked at as they may be sticking. Most likely a faulty brake hose.

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Does this wobble the steering wheel or your seat? The difference is very important. If it shakes the steering wheel, you have warped front rotors. If it's more through the car and seats, rear rotors are warped. Let me know please.

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replace the struts and shocks with gas charged units like Bilstein brand, it will stop the problem, u can buy them at a reduced price over local at the web link below.

http://www.autopartswarehouse.com/shop_brands/bilstein.html?gclid=CIjSs7vagqMCFSL6iAod1mJraQ&apwcid=X1093010841W41260599c6350&apwkwd=bilstein

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The noise you hear can be several things. I would start with looking at the U-joints on the driveshaft and then the brake rotors. Next would be the tierods and wheel or hub bearings. Finally the tires may be out of balance.
Somewhere there is extra play that is allowing it to shake. If you drive about 10 miles an hour and ride the brakes with your hands off the wheel you may see the steering wheel move side to side. That would show the front rotors are out of round.

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I doubt it. You'd have an ABS light on. All wheel are warm to scalding hot after even light driving. ABS systems do not apply brakes. They unapply them. They simply cut the fluid to one of the wheels / axle sets of brakes. (Newer stability control systems use the brakes) In your case. The ABS can deactivate either front wheel independantly, or the both the rear brakes together. You can take the wheel off & flip the pad & piston up to check it if you want, but I wouldn't think it was the brake dragging at the top of my list, no.

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