Topic: Disco 1 steering shudder?? (Read 4213 times)

Range Rover Ron · « **on:** October 19, 2009, 11:10:59 »

Hello MC'ers,
I'm scratching my head over a problem with a mate's disco 1.
At about 60 mph or over he can run along without any problems but if he hits a bump or pothole on the road he then gets a violent shudder.
He has to slow right down to about 30 mph before it goes away.

I put a new steering damper on it at Driffeild and it was great for a couple of months but has now retruned.
The Wheels are all balanced o.k.
The swivels have had new bearings top and bottom and the gaps shimmed.
The wheels have been aligned.
The tyre treads are all more than legal and evenly worn.
The wheel bearings are all good.
Track rod top & bottom on both sides are all nice and tight,
no lateral or vertical movement of wheesl on either side of Disco.
He says it appears worse from the near side wheel at times.

Hmmm
Any sugestions, I'm now looking at replacing the whole shock & spring set up.

Mud-muncher1 · « **Reply #1 on:** October 19, 2009, 11:17:23 »

i know this might be an off shot but have you checked the Uj's on both props, if not, check the bushes on the trailing arms

GORDON N · « **Reply #2 on:** October 19, 2009, 19:20:56 »

had the same happen to my disco it was down to the top swivel bearings which was adjusted and now is all good

eugene · « **Reply #3 on:** October 19, 2009, 19:23:51 »

mine did the same replace every thing new shocks and spring as well still does it but not so bad what size tyres is it running mine runs 235.85.16 mts

eugene · « **Reply #4 on:** October 19, 2009, 19:24:57 »

Quote from: eugene on October 19, 2009, 19:23:51

mine did the same replace every thing new shocks and spring as well still does it but not so bad what size tyres is it running mine runs 235.85.16 mts

also put a hd steering damper on it aswell

redhand · « **Reply #5 on:** October 19, 2009, 19:58:41 »

I've got the same problem with the 90 favorite suggestion so far on various other forums and next job on my list after doing swivels swivel pins wheel bearings and seal and fitting new sterring damper and replacing front radius arm bushes, is rear A Frame ball joint.

lambert · « **Reply #6 on:** October 20, 2009, 08:21:33 »

sounds like bump steer. castor angle may be out. check all bushes on front radius arms. if all ok consider castor ccorrected pollybushes.

300TDi Disco · « **Reply #7 on:** October 20, 2009, 18:12:22 »

I have got the same problem with mine and i have finally found out that the rear prop needs replacing. So thats where i am starting from.

Range Rover Ron · « **Reply #8 on:** October 21, 2009, 19:38:14 »

thanks guys,
I'll check out the various pointers,
Wheels, tyres and suspension are all standard.
Swivel gaps done.

weeone · « **Reply #9 on:** October 23, 2009, 09:58:41 »

Also.... check for mud on the tyres.

I had slightly worn bushes in the panhard rod, and mud on the wheel imbalanced them enough to give me real grief.

pinkrover57 · « **Reply #10 on:** October 23, 2009, 11:44:25 »

sounds like the swivel preload , take out a shim from each side of the top swivel bush and try it, if it works then you need to set the swivel preload properly...

good luck

mike142sl · « **Reply #11 on:** October 23, 2009, 15:28:17 »

Had the exact same prob with my RRC. Replaced the damper and all was fine for a few months until it started again. Turned out to be a duff damper so had to fit a second one.

Range Rover Ron · « **Reply #12 on:** October 28, 2009, 19:59:37 »

Hello mates,
I think the damper is the best thing to try even though it's had a new one,
like one of the guys said, it could be a duff damper having been O.K. for a while.
All swivels done as vibration was happening before and had them all set up by a specialist.
Cheers,

crazymac · « **Reply #13 on:** October 30, 2009, 20:08:57 »

Quote from: Range Rover Ron on October 28, 2009, 19:59:37

Hello mates,
I think the damper is the best thing to try even though it's had a new one,
like one of the guys said, it could be a duff damper having been O.K. for a while.
All swivels done as vibration was happening before and had them all set up by a specialist.
Cheers,

Did you prime the new damper before fitting?

You should fully compress and release the damper a few times before fitting!

redhand · « **Reply #14 on:** October 30, 2009, 21:46:10 »

I have now cured mine Either the radius arm to chassis bushes or the Panhard rod as all were kaput. now changed and running smooth as anything.

Rossko · « **Reply #15 on:** October 31, 2009, 21:02:26 »

If everything else were in good order, you should be able to remove the steering damper completely and not notice any difference. Duff damper will mean it just isn't as good at hiding problems elsewhere, so renewing a worn damper can appear to cheer things up for a while ... but the root cause is elsewhere.

Start by checking the preloads as already advised.

Range Rover Blues · « **Reply #16 on:** November 01, 2009, 03:29:09 »

Also worth checking the steering box is ok, the kickback was so bad on mine that it needed adjusting.

Range Rover Ron · « **Reply #17 on:** November 13, 2009, 20:05:44 »

Still hunting,
I've replced the steering damper with a super duper Terrafirma one,
still there!
Today I change the wheels diagonally from the front to back.
Checked the props shafts, all O.K.
Still happening.
Still hunting for the problem,
thanks all for suggestions.
May be the next place to look is the bushes, it is an old Disco and the bushes probably have never been changed.
Poly bushes next I think.
I've had a good look for play all around the steering bushes, pan hard rod etc. and found everything lokking and feeling O.K.
As I say, still looking.
Cheers,

Nick4X4 · « **Reply #18 on:** November 14, 2009, 01:53:51 »

i would be looking at the front shocks first ;)

denviks had the same and even though he had bushes gone it still did it after we changed them,
we then checked the shocks and found one of them to be.... well not very good :lol:, we changed that and prob was sorted :)

Range Rover Blues · « **Reply #19 on:** November 15, 2009, 01:24:58 »

My LSE suffered with steering kickback and I found when I stripped it that it had had new rubber bushes fitted. I put poly bushes in and it got worse!

Disco_Stu · « **Reply #20 on:** November 18, 2009, 10:54:09 »

I had the same problem - gradually increased over about 6 months culminating in a brown trousers moment on the motorway when I seriously rhought I was going to loose control. Changed the 13 month old Procomp dampers - no more problem...

I had already done the swivels, panhard rod bushes, all suspension bushes front and back, relocated HD steering damper plus the standard one etc, etc.

Stu.

Range Rover Ron · « **Reply #21 on:** November 23, 2009, 13:29:18 »

Thanks Disco Stu,
it is looking more and more like I'll be changing the suspension now,
my mates not got a lot of cash and having already spent over £250 getting his swivels changed and shimmed I'll probably wait until the spring or until we get a decent day so I can do the job on my driveway.
I'm checking out a full spring and damper set on ebay for £200,
anyone know of a better deal?
Cheers for now...................

scorpio · « **Reply #22 on:** November 23, 2009, 13:36:17 »

Check out MM4x4 they do some cheap kits as well as a good range at a reasonable price

Devon-Rover · « **Reply #23 on:** November 24, 2009, 10:44:42 »

For a absolute budget rebuild then buy the springs and the dampers separately just using the normal standard fair. You can't get super Dooper suspension for no pennies but original new will be better than shagged out old.

A little bit of searching of the online spring charts will tell you what springs you want.

more than likely it'll be for an earlier TDI

NRC2119 Green Disco TDI front.

and

ANR3058 Red, Grey Disco rear LA066329>LA081991

Once you have the necessary P/N for the springs call your local parts supplier and get the prices for the springs. Then with the remaining pennies buy the best Dampers you can afford.

News:

AuthorTopic: Disco 1 steering shudder?? (Read 4213 times)

GORDON N