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drakes



Member Since: 09 Oct 2009
Location: Hexham
Posts: 112

United Kingdom 2004 Defender 90 Td5 HT Auto Belize Green
What else causes steering to shake
My steering was starting to shake quite a bit over bumps and the swivel ball were very pitted so I decided to replace the lot.

So I bought and fitted a new steering damper, new swivels and top and bottom bearings the steering has improved considerably but it is still shaking to some extent and is not like it was a few years ago.
I know the preload on the top bearing has an effect on the steering but when I came to fit the top pins even without any shims fitted there was not much preload on the swivel. When I did this job on my previous 90 if you didn't use any shims the swivel would have been locked solid, so have I done something wrong, as it takes very little effort to move the swivel and I think this is where my problem is unless you know different.

Other than you not being able to turn the steering does having the preload set too high cause a problem or is it better too high than too low.

I have looked at bushes and joints around the front end and cannot see anything out of place.

Any suggestions gratefully accepted
Post #926554 20th Oct 2021 7:31pm
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Philip



Member Since: 09 Mar 2018
Location: England
Posts: 510

United Kingdom 
Ignore the steering damper, it’s not there to damp those kind of high frequency vibrations. If you’re sure the preload is set correctly, wheels and tyres are round and properly balanced etc, then I’d say it will almost certainly be bushes - radius arm or maybe Panhard rod (even if they look OK on the car).
Post #926557 20th Oct 2021 7:44pm
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drakes



Member Since: 09 Oct 2009
Location: Hexham
Posts: 112

United Kingdom 2004 Defender 90 Td5 HT Auto Belize Green
Phillip

I will check bushes again but I don't think the preload is correct, I didn't fit any shims when I built it up and there is very little preload, if there were shims in there I would be taking them out to increase the preload but there isn't so I can't get it any tighter
Post #926561 20th Oct 2021 7:50pm
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drakes



Member Since: 09 Oct 2009
Location: Hexham
Posts: 112

United Kingdom 2004 Defender 90 Td5 HT Auto Belize Green
Panhard rod bushes have been done this year with genuine bushes
Post #926563 20th Oct 2021 7:51pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3425

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
I guess your swivel is with 2 taper roller bearings, top and bottom?

I had similar problem with not enough preload with no shims, but on an old axle with the top Railko bush. My problem is that I forgot to install the Railko thrust washer FRC2906. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #926572 20th Oct 2021 8:09pm
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donmacn



Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

 
Not such a helpful comment if you have the seals in place, and the swivels filled with oil, but I’m pretty sure the preload should be set before the swivel seals are in place. (Ask me how I know!… not) Though if it’s already too tight I don’t know how that would work. As Dinnu says, you haven’t left out a thrust washer? I think there’s still one in there on the roller bearing set up, though I’d need to check a diagram.

I’ve recently done all the bushes on my car - panhard, radius arms and shocks. Prior to this My steering was a bit of a committee decision - more than a bit vague. Now it’s really precise, so having bushes in good condition is important.

I’ve had the steering wobble though and it’s not pleasant. First time around I got it into my head that the steering kingpin angle was wrong somehow and fitted castor corrected swivels and radius arms. That certainly sorted it. I think I still have the castor corrected balls in place, but the radius arms are back to stock. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #926578 20th Oct 2021 8:25pm
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drakes



Member Since: 09 Oct 2009
Location: Hexham
Posts: 112

United Kingdom 2004 Defender 90 Td5 HT Auto Belize Green
donmacn

Yes it is all back in place. I did try to set the preload before fitting the seals, the issue is that it is too loose not too tight. When I fitted the new top bearings I had to fit them without any shims to get any preload at all on it, normally I would expect to use at least some shimming to stop it being too tight but there are no shims fitted and it is still too loose. This is the same for both sides otherwise I may have suspected a faulty part.
Post #926679 21st Oct 2021 2:28pm
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markb110



Member Since: 22 May 2010
Location: Guildford
Posts: 2644

England 2002 Defender 90 Td5 HT Epsom Green
A few months back I changed my pre-production Terrafirma + 5 dampers (given to test) to OME +5 from Gwyn Lewis plus the steering damper.

Whilst under there I changed the bushes on the front anti roll bar …..took it for a drive and had a shimmy in the tyre balancing range.

Had all the tyre balanced, made no difference, just moved the speed up before the shimmy.

Changed the rear prop as UJ’s and slider on the way out, same problem
Changed the front prop shaft for the hell of it, same problem. Though I now have a good spare Whistle
Took off the anti roll bar
Rechecked and re tightened the damper nuts, no change
Installed an adjustable Panhard rod (due to the 2 inch lift)
Popped down to my local specialist garage and they said before checking the preload move the tyres front to back.

I did that, reset the pressures and problem solved.

Why….. Censored knows, worth a try though before it drives you mad.

Thumbs Up
Post #926689 21st Oct 2021 3:39pm
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piechipsandpeas



Member Since: 12 May 2021
Location: Albany, Western Australia
Posts: 215

Australia 2013 Defender 110 Puma 2.2 SW Indus Silver
Worth checking all nuts / bolts on all steering / axle components are tight and correctly torqued. Recently had a wobble in the steering and one one of the two bolts holding the panhard rod bracket to the chassis was loose.
Post #926822 22nd Oct 2021 10:30pm
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donmacn



Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

 
drakes wrote:
donmacn

Yes it is all back in place. I did try to set the preload before fitting the seals, the issue is that it is too loose not too tight. When I fitted the new top bearings I had to fit them without any shims to get any preload at all on it, normally I would expect to use at least some shimming to stop it being too tight but there are no shims fitted and it is still too loose. This is the same for both sides otherwise I may have suspected a faulty part.


My logic was, if there was something missing, then the swivel housing would be loose, and no amount of shims would tighten it up.

I had thought there was a thrust washer at the bottom bearing, between the inner race and the swivel pin, but I don’t know where I’m getting that from as I’ve just checked the diagrams and there isn’t one shown.

Is it oil tight? I guess so, or you’d have mentioned that. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #926848 23rd Oct 2021 9:02am
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