Vibration at 60mph

[Bob696]

The stats to start

late 200Tdi 90 (discs all round), 2" lift, grip edge tyres (like trac edge AT but softer.

Now the problem
At 60mph I am getting a vibration and a low 'drumming' noise. It wasnt there 5-6 weeks ago when we went to north wales and back. I dont do much motorway work so I dont know how long there has been a problem.

It is definatly speed related rather than revs/gears as I have run the car in 5th low without the same fault.
There is no heat in wheels/tyres/hubs
When I first found the fault last weekend I changed the front prop for a wide angle thingy.
Before the trip to wales I changed the front output flange and seal on the tbox.
I have checked ep90 levels front and back diffs and tbox
Tyres seem OK with no missing wieghts on the wheels

Trouble is that its damn cold and dark when I get home from work and I have this weekend to fix it.
This weekend I intend to change the UJs on the rear prop (one was done 8-9 months ago but cant remember when the other was done) but never had this sort of sound when a UJ has gone before so I aint pinning my hopes on it fixing the problem.

Question is what else should I be checking and how?

Oh yeah
May be unrelated, I very occasionaly get a non rythmic 'weep weep' sort of noise at lower speeds. Always whilst straight and level and just cruising on the power.

[L90OOK]

I'd put money on it being the remould tyres causing the vibration...have you got someone to swop wheels with to eliminate?

[Bob696]

do remolds 'suddenly' go like that ? Not been happy with them for a while as they are wearing quickly.

I have a 110 as well so could swop the wheels over on that. Rather horrible wheels though :-(

[Karen696]

It ain't HIS 110!! and if he says my wheels are 'orrible I won't lend them too him!  Cheeky monkey, least my car isn't making strange noises....

And he nicked my original BFG Trackedge as a spare for his car  (ingratitude, thats what I call it).

[muddysteve]

thats a prop uj without doubt

had exactly the same on mine vibration starts around 55mph and then seems to go away/get drowned out after about 75

the weep weep sort of squeaky noise is where on of the bearing cups has run dry and is partialy seized. you might not notice it on the car i didnt but once the prop was removed it was all to evident where the problem lay.

good luck with it (i'd check the front prop t-case end 1st)

[martha focker]

ye defo prop, might just be a bolt loosened off, half an hour job, if youv got replacement :lol:

[Bob696]

Just went and bought 2 UJs as it happens so that will be the first to do on saturday. Hope it gets a bit warmer ... I dont have a garage and my shed is full of land rover spares (should never have bought those 2 LT77s). If that dosnt fix it I will just have to put the 'orrible wheels on and give that a go.

cheers folks

[bertie_bas205]

Wheel bearing???

Bertie.

[landraver]

Hi Bob (I met you & the kids & Mudclubmatty at the last lro show).
I know you've checked the weights etc on the wheels, but it sounds very much like a wheel balancing problem to me (at that speed). If I were you, I'd either swap the wheels or get them balanced as a first step.

Jeff

[Saffy]

thats a prop uj without doubt

had exactly the same on mine vibration starts around 55mph and then seems to go away/get drowned out after about 75

the weep weep sort of squeaky noise is where on of the bearing cups has run dry and is partialy seized.

I say it the prop too, had same symptoms and even the funky noise at low speed. Does not take much to lay under truck and wiggle the prop and see if a UJ is shot bad enough to vibrate and make noises.

[j.stobart]

try the diffs for play, i had a similar noise a while ago, and my diff was completely shot. Easy way to check is to check for lateral movement at the end of the props where it joins the dif flange. also check rotational play, is there much movement before take up?

[Bob696]

Not UJs :-(

Replaced both on the rear prop today. One was deffinatly on its way out so hopefully thats the 'weep weep' noise sorted.

Swop wheels tomorrow.

Please dont mention diffs going :shock:  

[Bob696]

well it wasnt the tyres or wheels either (although the vibration was notably smaller with the other wheels on)

At a loss now. Power steering pump is also losing fluid down the drop arm at a great rate of knots. Could the steering be the problem?

[muddysteve]

have you tried the front prop?

i find they go at the tbox end at regular intervals, you might not be able to feel it with the prop still on the truck

[Bob696]

new front prop (changed after problem started)

Getting worse btw .. now feels like car is shaking itself to bits and the steering is well 'wobbly' at 55. Sounds like the bearings (as the wheels were sound on the 110) although they check out OK ie no wobble. Might end up replacing the steering damper as well.

[garybrun]

Its not over run is it??
Has the problem only started since you changed the propshaft after you had the lift done?

[Bob696]

Its not over run is it??
Has the problem only started since you changed the propshaft after you had the lift done?

Had the lift for 3 years. New prop for 3 weeks. Changing both front bearings at the moment. Hope that fixes it.

[Dixie]

Mine's got a similar noise at 55mph but I definitely reckon it's the front prop. The things don't seem to last that long on my wagon.
How often should the prop shafts be greased anyway? I do mine every month, honest  :^o

[L90OOK]

How are the chassis & panhard rod bushes?  If they are worn it could be those...especially with a 3" lift.

[python]

i used to get the same thing sometimes, changed my steering damper and has cured the problem, also have done the u'js, also i noticed my balljoints beside the damper need doing, have you looked at them or track rods?

[Bob696]

i used to get the same thing sometimes, changed my steering damper and has cured the problem, also have done the u'js, also i noticed my balljoints beside the damper need doing, have you looked at them or track rods?

wish you had said that a couple of weeks ago  :lol:

Changed the damper this week and it has fixed it  :D


Cheers to all

[Mo Murphy]

Bob,
have you checked your swivel pin preload ? Sounds like you need to remove a shim on one or both sides. The book tells you how to do it properly :)

Mo