Vibration when driving

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Yes checked all drive shafts for play all tight.
Did change front diff oil day before we left.
Only good thing is to get wifi I have to sit drinking beer
Over looking the pool Ooo la la
 
tonybirch said:
Yes checked all drive shafts for play all tight.
Did change front diff oil day before we left.
Only good thing is to get wifi I have to sit drinking beer
Over looking the pool Ooo la la
Click to expand...

VCU Viscous Coupling Unit (NOT centre differential, sorry Ant) Jack one front wheel, you should, with a considerable amount of effort, be able to turn it. If it doesn't turn the VCU is seized which will cause transmission wind up:eek:
 
it might be stating the obvious but all your tyres are the same size and you don't have any flat spots on your front ns caused by either standing too long or heavy braking and locking up caused by say..towing?

Brake caliper pins are free and working not causing them to seize on?

No play in the shocks and bushes and mounts on both front shocks are secure?
 
When I had the wheel off the ground yesterday. It would turn front to back
Then it would stop but I didn't use any force. I take it the car should be in neutral
 
tonybirch said:
When I had the wheel off the ground yesterday. It would turn front to back
Then it would stop but I didn't use any force. I take it the car should be in neutral
Click to expand...

A bit of free movement front to back is normal, it should continue to turn after the slack is taken up but it will be very hard. Yes box in neutral but you can leave the handbrake on.
 
Thanks data will give it a go when daughter has finished
In the pool.... To everyone who has posted on this topic thanks alot.
 
Datatek said:
VCU Viscous Coupling Unit (NOT centre differential, sorry Ant) Jack one front wheel, you should, with a considerable amount of effort, be able to turn it. If it doesn't turn the VCU is seized which will cause transmission wind up:eek:
Click to expand...
But doesn't it act like a Centre Diff without actually being one!!

(And I did decypher it as the Viscous Coupling Unit :D:D:D )
 
So say then when I can drag my daughter from the pool.
I jack it up and the front wheel won't turn under pressure
What's the verdict/ solution
 
If it won't move at all beyond the natural slack take up - the VCU has seized, this will cause the 4 wheels to try an rotate at the same speed and cause scrubbing and jerky when trying to turn corners....

That would mean a new VCU is required - ££

If it turns really slowly with a good amount of effort the VCU is probably fine.....

I am not sure if a seized VCU would cause oscilating up-down movements at the front end though...!!
 
Ok jacked up f/n/s gear selector in neutral
Hand brake on. Put wheel brace on and bounced the didn't budge
Did the same on other side wheel never moved.
 
Saint.V8 said:
If it won't move at all beyond the natural slack take up - the VCU has seized, this will cause the 4 wheels to try an rotate at the same speed and cause scrubbing and jerky when trying to turn corners....

That would mean a new VCU is required - ££

If it turns really slowly with a good amount of effort the VCU is probably fine.....

I am not sure if a seized VCU would cause oscilating up-down movements at the front end though...!!
Click to expand...


Only guessing, but depending on load distribution, I reckon a seized VCU could cause bouncing as the transmission unwinds over minor bumps in the road.
 
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