When running on the lift, my Murcie's front wheels don't drive, but my 6.0's do.
Also, when I turn the front wheels on the Murcie the rears don't move, but the 6.0 rear's turn with the fronts.

Can anyone tell me if there is any difference in the Viscus coupling resistance on these two cars.

your diablo's back wheels turn with the front????

please tell me what you meen?

also the murci is not a awd like most cars. but the front get less than the back

Yes the 6.0 fronts are connected firmly to the rears. When I grab and turn a front wheel, ALL the wheels spin. If the e brake is applied you could over come the viscous coupling when turning the fronts, but it's HARD.

And as I mentioned, there is absolutely no connection from the fronts to the rears on the Murcie.

I guess I need to check to see if the driveshaft is spinning. This won't be easy because on the Murcie, it is hidden in a tube.

Before I started tearing things apart, I just wanted to see if the system works differently... like was RPM or torque sensitive, or works with the traction control. The only difference I could see is that the Viscous coupling is in the front diff, not in the trans as it is on the Diablo.

Thanks,
Frank

I think you may have just solved your own question. I'm extremely curious though. I'm going to look into this as well.

I just got back from a test drive.
There is no way drive is going to the fronts!
The rears light right up as soon as the car tries to accelerate. Even at the top of 2nd.

I think I'm going to try to drop the front diff to see if the drive shaft stub turns with the back wheels. If it does, then it's the coupling. If the drive shaft doesn't turn... well judging from the schematics, the drive shaft or transmission stub that sticks out into the drive shaft, has to be broken.

Maybe I'll get lucky and the drive shaft will just be missing.

Lets hope its not the coupler itself although I sort of doubt it. I think you are on the right track.

The only failed coupler I saw was on a Diablo and the ejection/failure of the main gear took out the casing - that was one expensive burn out.

When you say "missing", are you thinking someone did a 2WD conversion?

-mick

my bad.. when you sayed turning i thought left and right..looool i need to drink my morning coffee before replying next time...

I'm hoping someone did a 2 wheel drive conversion by removing the drive shaft.
I think that's the least expensive fix. And I don't have to pull the motor to fix it.

ive heard of people doing it to both murci and diablo..

OK, here it is...
A broken Murcie Viscus Coupling.
It's split along side the one weld. It almost looks like they were slightly off the weld joint when weld was made.
When you spin it is runs out badly. It actually looks like it split and opened up from hydraulic pressure, not mechanical stress.

I can wait to cut it open and see how it works.

Attached Images

	Viscous Coupling Broke (1).jpg (31.0 KB, 13 views)
	Viscous Coupling Broke.jpg (55.3 KB, 13 views)