Help with Steering Vibration

Hi folks thanks for looking. I have a defender 90 with a vibration!1 The problem normally starts when steering to the left about 50 + miles Hr. Also if your on the motorway and my left wheel drops into were the lorries have been running creating a rut, and it starts vibrating. The vibration is very violent and you have to slow down to eliminate it. Its as almost the front left wheel starts jumping up and down..
I have fitted the dam thing with the following:-
New OME Steering Damper, This morning!
New Pro shock Suspension Struts last week.
All the bushes have been replaced.
All the Track rod ends are a year old
Tyre air pressure 26psi On Mud Tyres and Disco Alloy wheels spacers fitted.
Checked the Springs, and there is no lift kit on it..
There is no anti roll bar on the front axle.
The only thing I can see is the Steering arm set up is an arm of the steering box onto a track rod end style bush! Is there a modification for this available to make a better connection?
Any Help is appreciated.
Cheers
Andy

Swap front tyres over, one might not be as well balanced as the other.
Check the preload on your swivels and the condition of the bearings/bushes.
Check the wheel bearings aren't loose.
Check al the radius arm bolts are tight, front and rear!
Check the bushes aren't loose, you say they're new, but use a crowbar or similar to check for movement outside their proper pane of movement.
Check the steering column UJ's and fittings aren't stiff, especially the top one. ANY stiffness causes issues.

That'll do for a start ..

Sounds like swivel pins need looking at. Jack each front wheel up and check for movement whilst holding the wheel at 12 and 6 o’clock. If you have play then you’ll need to check the shims and bearings/bushes/pins.
If not, look at some of the other possibilities that Paul has mentioned.

bluedog333 said:

check for movement whilst holding the wheel at 12 and 6 o’clock

Click to expand...

You would also get that with wheel bearings.... you forgot to mention the bit about about 3 and 9 and no play.???

Cheers

neilly said:

You would also get that with wheel bearings.... you forgot to mention the bit about about 3 and 9 and no play.???

Cheers

Click to expand...

Yeah yeah, just making sure you’re all awake.

bluedog333 said:

Sounds like swivel pins need looking at. Jack each front wheel up and check for movement whilst holding the wheel at 12 and 6 o’clock. If you have play then you’ll need to check the shims and bearings/bushes/pins.
If not, look at some of the other possibilities that Paul has mentioned.

Click to expand...

Swivel pins get my vote anorl.