Is this correct ?

the @thefrog is probably wishing he didnt ask now .

J

marjon said:

the @thefrog is probably wishing he didnt ask now .

J

Click to expand...

I said before that discussions about different 4WD terms never end.

Well discussions on how the VCU works never end either, but include twice and many posts and four times as many arguments.

GrumpyGel said:

Not available in my country, comments turned off.

They are even more restrictive than videos from the @Hippo channel

Click to expand...

Click on the link saying 'play on youtube'

Ok ok

But when the guy in the video says "when it heats up (the VCU) it starts to grip".
This is rubbish, it grips all the time and 'slips', that's how it doesn't break the transfer box.

It grips more when its cold and should grip less when it heats up as the silicone would be more fluid, no ?

marjon said:

No, its not a physical mechanical connection, Does it actually have parts bolted/locked with a lever, together?

Ok so its a variable fluid connection .

J

Click to expand...

Now you are playing with terms.

And simple mechanics

Yes everything is bolted together. Or at least, they should have been when leaving the factory (no guarantees there, its a Land Rover).

No there are no levers - it uses the components' physical properties to drive the rear axle with a degree of slip when all wheels have traction and no slip when one, or more, does not.

Next come back please

thefrog said:

Ok ok

But when the guy in the video says "when it heats up (the VCU) it starts to grip".
This is rubbish, it grips all the time and 'slips', that's how it doesn't break the transfer box.

It grips more when its cold and should grip less when it heats up as the silicone would be more fluid, no ?

Click to expand...

Oh no!

(Slaps head)

Here we go again.

It has been a couple of years I suppose.

thefrog said:

Ok ok

But when the guy in the video says "when it heats up (the VCU) it starts to grip".
This is rubbish, it grips all the time and 'slips', that's how it doesn't break the transfer box.

It grips more when its cold and should grip less when it heats up as the silicone would be more fluid, no ?

Click to expand...

Everything you need to know about the VCU is in Wikipedia.

The VCU will keep the front and rear wheels locked together, but how hard they are locked together depends on the rotational speed difference between the front and rear axles.

marjon said:

the @thefrog is probably wishing he didnt ask now .

J

Click to expand...

The LZ equivalent of debating how many angels can dance on the head of a pin.

Ahhhhhhhhh

I get it.
Thanks.

thefrog said:

Ok ok

But when the guy in the video says "when it heats up (the VCU) it starts to grip".
This is rubbish, it grips all the time and 'slips', that's how it doesn't break the transfer box.

It grips more when its cold and should grip less when it heats up as the silicone would be more fluid, no ?

Click to expand...

no.

J

GrumpyGel said:

it uses the components' physical properties to drive the rear axle with a degree of slip

Click to expand...

Well then.
Oil is not a bolt is it?
If things slip there is not a positive mechanical connection?

J

He says many are 2wd because viscous unit fails and people take the prop shaft off, not that some are sold as 2wd

marjon said:

Well then.
Oil is not a bolt is it?
If things slip there is not a positive mechanical connection?

J

Click to expand...

So what's between a clutch plate and the flywheel?

GrumpyGel said:

So what's between a clutch plate and the flywheel?

Click to expand...

Oil that's leaked out of a failed crankshaft seal?