Patrol Vibration

Have you swapped the front ones around only?

DC, Once you have exhausted all the obvious stuff, I would look at having a compression check done.

Having said this of course, if a cylinder was down it would be more rev related than speed.

Cheers...Lionel.

check the wheel bearings for play.

Did you make sure the universal yokes went back the same way as they were dismantled when you replaced the uni crosses?
Gerry

Replace front end bushes. All Bushes including track rod bushes. they may look ok but any degradation of the rubber will cause unwanted movement.

Does it only happen in 5th gear??? not 4th at same speed?

If so, could be the gear box. Had the same symptoms in a previous Patrol myself if this is the case. I'll elaborate if this is your issue too.

Does it go away when you are cornering, particularly in lefthanders?

If so check panhard rod bushes. My old GQ developed a problem that started out as you have described and got so bad that I could bearly hold the wheel.

It was panhard rod bushes. A general mechanic in Nyngan picked it up after I had spent over two years visiting all kinds of suspension specialists. They all wanted to fix the big things and it really was something quite small.

Duncs

I have a 06 GU 4.2 with the same problem.. seems to get worse in corners (eg gentle corner on a freeway at 85-90km/hr seems to start it up an then it seems to get better onthe straight but not completely dissapear. will watch this post with interest too.. (
also pulls to the left quite strongly) and I have had several wheel alignments and brand new tyres..

I had the identical problem as Coyote with my 2000 GU 4.2 diesel Patrol. Had suspension, tyre specialists and one Nissan dealer look at it with nothing but short lived success. However since having the car regularly serviced by another local Nissan dealer I have not had the problem in over 50 000 km. I believe the problem was remedied through tyre rotation [especially front to back] every 5000 km and correct wheel balancing - which is Nissan's recommendation anyway. I found that unless this rotation is specifically requested the dealers, during the 5000/10000 km services - generally put the better tyres on the front which are - up to a certain km - the front tyres themselves. I hope this helps.

Hi
My 2000 model also was doing this. Did everything you done. Then had the shims in king pins done End of problem. The lift kit caused the wear. Anyway 2 hr job some 20000kms ago fixed problem

Gday dune sorry for the late reply but always look at issues with 4.2 nissans
mate i had i similar issue after the lift kit and fatties went on but vibration was around 120k s and could not get the steering wheel straight with wheel alignments
as the lift had moved the rear diff to the left therefore the tailshaft was outa line and rear wheels too
easy fix with adjustable panhard rod however patrols are mogrels to keep wheels balanced mine still has a mnor steering wheel shimmy around 90ks
hope this helps Cheers Barn

About that year early models of late shape had balance problems and wheels had to be balanced on Nissan centre cone and wheel nuts done up in correct order to help fix problem, later patrols not so much problem with wheel nut order but still needs correct centre cone
Cheers
Charlie