Vehicle & Technical > Discovery

wobble/vibration - help!

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Matt_H:
On Saturday I decided to take the disco out.  Got up to about 30 mph and there was a mega wobble/shake/vibration.  The dash shook, the steering wheel wobbled etc.

Got home and swapped wheels and tyres front to back - I noticed that one of the weights was missing off one of the front ones (steel 16" wheels with bronco 235/85/16 grizzly claws on).

I got the wheel rebalanced, although the only place I could find to do it (kwik fit) had to use a special 5 pin adapter but they'd lost one of the nuts - so I'm guessing that put the whole thing off balance anyway.

The wobble/vibration got less with either the tyres swapped or the originals, now with one rebalanced, back on the front.  However it still wobbles more than I remember it doing.

Oddly enough if you accelerate 'hard' it wobbles/vibrates, if you leave it to overrun then it seems to go away.  The wobble/vibration starts at around 35mph and goes on until 60 ish, when I'm starting to run out of accelertion.  Just cruising along at 60 (or any other speed) seems to be fine.

I've tried 15 tyre places and not one of them is able to balance them cus they dont have an adapater big enough for the holes in the middle of my tyres (Basingstoke and Reading).

Before I start getting the serious tools out (read taking her to a land rover specialist), has anyone had this, or do you happen to live near basingstoke/reading/bracknell/berkshire and could lend me a set of tyres for about 30 minutes?

TIA

hobbit:
Have you checked the wheel bearings/swivel bearings area to see if they are ok, going further in to the middle is the diff and prop ok?

Matt_H:
the swivels etc were all rebuilt quite recently - one last year, one this year, so I'm not sure it could be that.  

The diff itself, maybe, although I dont dare take that apart on my own!

Just off to try someone elses wheels on.. If it's not that I'll book her into safari I think!

Budgie:
As Hobbit says, it coud be:
Swivle pre-load needs tweeking
Wheel bearings need tighened
Steering damper shot
Duff propshaft U/J or balance weights come off the prop
Track rod end gone
Suspension bushes.

I replaced the CV joint on Disco and found that there is a bearing in the stub axle, that the drive shaft runs on, this had gone on mine and was causing a vibration but I'm not sure if the 200 series had these or a bronze bush.

To check the wheel bearing/swivle preload, jack one wheel off the ground and grab the wheel at the 12 & 6 o'clock positions and try to move the wheel in & out, if you feel movement then check the swivles. Now grab the wheel at the 3 & 9 o'clock positions and do the same again. If you get movement here than it could be the wheel bearing.  :wink:

jjsaul:
Check your UJ's

I had very similar symptoms and discovered about 1/4 inch of play in a front UJ  :shock:

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