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[tree man]

If I turn the steering on a full lock on my 1999 Cherokee and drive forward I get a strange noise coming from the back end (the Jeep, not me). Obviously on full lock I'm going quite slow and it doesn't always do it, but it's loud and horrible enough to make me think it shouldn't do it at all. No problem in a straight line. The noise sounds a bit like when the brakes are only just biting when your just moving, but a bit more juddering, something meeting metal when it shouldn't sort of noise.  I've had the back off the diff (non lsd) and it looks okay, but I've noticed that I can move the rear wheel in and out by a milimetre or so, is the half shaft only held in by that clip?? and will that fail on an MoT?Any suggestions gratefully recieved

[Dave69]

endfloat on the rear axle is ok as long as it is not in the up and down direction.

Try looking at your UJ's as these could be on the way out. full lock and turning puts more load on the joint so any failure will be more obvious. the vibration would transfer to the transfer case and give you the feeling the failure is at the rear

[JamesH]

Is it a 4.0? What position do you the transfer case level in?

[tree man]

I will check the front UJ's as as you say sound travels and can easily be misread. That said I had a good listen and look today and the noise definately seems to be coming from the rear axle and I would go further and say from the wheel end. Its a 2.5 diesel and I checked the box levels a couple of weeks ago with the vehicle on the level. Could the hub/halfshaft end float, if excessive due to some other issue, cause the brake shoes/hub/drum to contact when they shouldn't when turning sharp? The outer half shaft bearings have no apparent play, don't make funny noises and spin freely.

[JamesH]

Assuming you are driving in 2WD and not 4WD, I suspect it'll be a knackered limited slip diff. You may be able to renovate with new clutch packs but if you search you'll find several answers and write-ups on the job - it's not something I've done but is common, even more so on the ZG / ZJ Grand Cherokee (same axle).

[Bishops Finger]

Think he could be right...

[tree man]

Finally tracked down the cause of the noise. I had a suspicion it was the brakes binding as it was worse the heavier I braked, especially with a trailer on. I removed the rear drums and one had obviously been well used so I slackened off the hand brake adjusters and hey presto no noise, the hand brake lever is a bit higher than I would like but I'll live with that. Must have been too little clearance between the shoes and the drum and perhaps a bit lazy on shoe return spring/mechanism causing the shoes to stick for a moment. Why it was worse when turning sharp I don't know, something to do with the end float?? Anyway thanks for your input

[GREGBLACK]

Hi was there a ridge of rust inside the drums next to the outer edge? this can make that sort of  noise but is easily cleaned off, it also can happen with discs.