Vibration under load

superdougie · Aug 14, 2013

Hi can somebody point me in the right direction; i've got a raised landrover 90 (Disco 200tdi conversion) and the truck has developed a violent vibration (to the extend in undid a screw on my stereo) it seems to happen at 35ish mph or under heavy load (if I increase speed very slowly its not as bad) and I can feel it through the pedals and seat but the steering wheels not bad. I've replaced the front and rear prop UJ's and transfer box bearing (old one fell to bits)
Before the work was completed it didn't vibrate so violently/if at all so i'm guessing the issue was masked by the faulty parts.
Has anybody got an idea in the direction to be looking as its terrible?

Superdougie

-Defender110- · Aug 14, 2013

wheel bearings? tyre balancing?

superdougie · Aug 14, 2013

I was thinking bearings, ive just had a look before the rain hit and the drivers side wheel is weeping, just below the ball joint. do you think this could be the culprit?

howardo · Aug 14, 2013

what are the tyres like?

superdougie · Aug 14, 2013

Tyre's are good, insa turbo specials, plenty of tread

Trewey · Aug 14, 2013

your suspension lift is causing the prop yokes to bind.
fit wide angle props or remove lift.

-Defender110- · Aug 14, 2013

superdougie said:
I was thinking bearings, ive just had a look before the rain hit and the drivers side wheel is weeping, just below the ball joint. do you think this could be the culprit?

do you mean the swivel? If so, you need to do the seals on it but its probably not related. wheel bearings are easy to check, grab the top of each wheel and pull it (as if you are trying to pull it off) if it has play, bearings need tightening. ideally you should lift the weight off the wheel you are checking, but if they are the culprit of your vibration, they will be loose enough to notice by rocking while on the ground.

may also be the bearings in top and bottom of swivel.

superdougie · Aug 14, 2013

Ive just done a quick search and people are mentioning double cardon props? And I think there's off the shelf kits available with varying prices.
Im gonna get the jack under in the morning and give the wheels shake to see if we can rule it out

Thor1950 · Aug 14, 2013

your tyres are scapled. new shocks and repairing/replacing tie rod ends,and ball joints. larger tyres and raising the suspension magnify existing problems. A good tyre shop would have a machine that can shave your tyres back to round again

superdougie · Aug 14, 2013

Potential barking up the wrong tree but what about death wobble? (What a name hehe)

craigyb · Aug 15, 2013

Thor1950 said:
your tyres are scapled. new shocks and repairing/replacing tie rod ends,and ball joints. larger tyres and raising the suspension magnify existing problems. A good tyre shop would have a machine that can shave your tyres back to round again

Got FA to do with tyres. As trewey said its because of the lift, double cardon prop will solve it

craigyb · Aug 15, 2013

superdougie said:
Potential barking up the wrong tree but what about death wobble? (What a name hehe)

Death wobble 9 times out of 10 is down to worn swivel bearings, which can be nipped up by removing a shim from the top pin, if there are any shims left on. How much lift you got?

Thor1950 · Aug 15, 2013

craigyb said:
Got FA to do with tyres. As trewey said its because of the lift, double cardon prop will solve it

If you do a search about scalped tyres you will see

craigyb · Aug 15, 2013

Thor1950 said:
If you do a search about scalped tyres you will see

Not his problem

krams300 · Aug 15, 2013

Where did you purchase your props from? are they new? are they the correct ones for the vehicle? have they been split apart? if so have they been put back together correctly, are the yolks correctly aligned? if the yolks are not lined up correctly this will cause your vibration

superdougie · Aug 16, 2013

I got the props with the motor, the front looks like its been welded at the slip joint also I managed to get out and have alook at the wheels before work.
Holding the wheel at 3&9 theres play
Holding the wheel at 12&6 theres tonnes of play
I need to have alook at the shims mentioned and liiks like the bearings need doing.
The running gears still the original 1985 90 setup and I think its all starting to need replacing. Is it worth new swivels aswel do you think?

GINGE · Aug 16, 2013

if you had just done the lift then i would go with trewey and craig. I would have said your prop shafts are binding due to lift and no castor correction. Could even have been prop shaft phasing.

But if noise wasnt present before but now is then id be more inclined to think wheel bearing and or hubs. You dont just get prop bind, you either have it or you dont and it dosent always follow a pattern.

As has been said, if you have movement in the wheel when on the floor then you will need the bearings changing.

Vibration under load

superdougie

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-Defender110-

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