Range Rover shimmy.

Sep 20, 2008 13 Replies

OK, an update.



new tyres, new track rod ends (for the MOT), no bushes failed the MOT.



I looked into the preload - driver's side was a bit slack so removed a shim from it. Passenger's side seemed more or less right, might be a tad slack but not so much so that the swivel flops over to one extreme on it's own. I left this one alone.



It still does it. Since fitting the tyres, it doesn't go into a terminal wobble, but it's still very definitely there.



I happen to have some new dampers around, may try changing them next. However, anyone got any other suggestions?



Steering damper may not be up to spec but it's not shagged either. I don't have a new one of those to hand to compare, although I do have what seems quite a good used one about. Might be worth swapping it to see if it makes any odds.



Front wheel alignment? 1/16" toe out for a RRC.

Has it had a lift and not had the bushes changed to correct the caster/swivel pin inclination?

On or around Sat, 20 Sep 2008 21:00:12 +1200, EMB enlightened us thusly:

dunno, but they're meant to have checked it when they fitted the new TREs and did the MOT. They charged me for it... it's not altered its behaviour since before the MOT.

no.

I'll have a look at the steering damper again, I know when I had a totally shagged one on the 110 it produced similar symptoms. Might be that it's on the way out, but not totally shagged.

"Austin Shackles" wrote in message news: snipped-for-privacy@4ax.com...

Swap the wheels front to back and re try , if only to eliminate them.

Lee D

On or around Sat, 20 Sep 2008 16:30:06 +0100, "Lee_D" enlightened us thusly:

I think if they were severely out of kilter the tyre types would've noticed when balancing them, and told me.

Pulled the steering damper off today, and while not shagged as such it's not as good as it might be, so put another one on which, while not new, seems to be in good nick.

we shall see if it improves. If it makes a noticeable difference, I shall maybe invest in a new one.

A steering damper is like a stabiliser with a caravan /trailer - it's an add-on (yes, I know that it eventually became standard on the RR) and should not be necessary to ensure a stable basic setup.

If you control the shimmy with a damper, the likelyhood is that you're concealing something less than perfect elsewhere.

My money's still on the swivel bearings but I can fully understand that you don't want to go in there unless absolutely necessary!

You've checked the front suspension bushes - have you looked at the bolts/bolt holes for the main radius arm bushes and particularly the panhard rod bushes?

Did you describe the circumstances under which the shimmy occurs? Is it a pothole-induced thing or there all the time?

in

I've always found it's usually wheels out of balance or misshapen tyres. Just lately I had some wheels balanced and after they were balanced I asked if I could slacken the wheel clamp before the wheel was removed from the machine, turn the wheel about one third of a turn or so without turning the machine spindle, then recheck the balance and it was well out. Now doing that shouldn't have affected the reading, but it did. I can only conclude there was something wrong with the balancing machine, I wonder how many more would give this result if checked in this way?

Martin

On or around Sun, 21 Sep 2008 18:23:09 +0100, Dougal enlightened us thusly:

potholes at 50 mph plus.

It's noticeably better now, with the other steering damper.

Actually, I'm not convinced about the damper. Taking it off a series III made no apparent difference, but on the 110 I had before, a shagged damper gave exactly the same thing as this rangie, and replacing it cured the problem completely. I think it's pretty much an essential part of the plot now.

"Austin Shackles" wrote in message news: snipped-for-privacy@4ax.com...

It's them welsh roads since all that rain!

:-)

Lee D

On or around Sun, 21 Sep 2008 23:00:58 +0100, "Lee_D" enlightened us thusly:

Actually, the roads here are used to it. Brum is worse... although most of the time you're not doing 50+

"Austin Shackles" wrote in message news: snipped-for-privacy@4ax.com...

The only time you can officially do 50 plus in brum is if you have the spar shop window jammed in the boot.

;-)

Lee D

would that be the one with cash dispenser attached Lee?

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"Austin Shackles" wrote in message news: snipped-for-privacy@4ax.com...

Hi Austin. I could have sworn you gave me the answer to this one a few years ago. It'll either be shockers or the steering column, my guess is the column, it only takes a tiny bit of play to produce the shimmy. TonyB

On or around Wed, 24 Sep 2008 18:58:11 +0100, "TonyB" enlightened us thusly:

wasn't me, I've not had a rangie before.

Steering column had play and has been replaced. Nothing on the MOT about bushes or joints.

It is however behaving better with the other steering damper on. Might buy it a new one in a month or so when money's a bit less tight.

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