When you changed the fluids recently did you add the correct amount of limited slip additive? If you used too much it can cause the Vari-Lok diffs to slip too much.

Also, it could be that your Vari-Lok diffs are working exactly how they are supposed to. They will slip in certain situations because this diff is still a limited slip and not a locker.

You can check if your Vari-Lok diffs this way according to the FSM:

1. Make sure that the differential fluid is the correct type and at the correct level.

2. Drive in a tight circle at 5 mph for 2 minutes to fully prime the gerotor pump.

3. Block the wheels on the axle not being tested.

4. Shift the transfer case into the 4WD Low position and the transmission into the Park position.

5. Raise both the wheels on the axle to be tested off the ground.

6. Rotate the left wheel by hand at a minimum of one revolution per second while an assistant rotates the right wheel in the opposite direction.

7. The left wheel should spin freely at first and then increase in resistance within 5 revolutions until the wheels cannot be continuously rotated in opposite directions.

8. The Vari-Lok differential has engaged properly if the wheels cannot be rotated in opposite directions for a moment. Shortly after the wheels stop rotating, the fluid pressure will drop and the wheels can be rotated again.

9. If a Vari-Lok does not operate properly, it has to be replaced (it can't be repaired).

 

Some more information would be useful.

Is the problem at the rear?

Or, is it at the front?

Or, is it at both front and rear?

Is it true that both wheels, right and left, on the same axle are in the mud at the same time?

One wheel spins and the other does not. Is the WK moving around the muddy track or is it stationary while the wheel spins?

Finally, just in case you did not know, the Quadra-Drive differentials do not lock. Instead, they are limited slip, and the amount of power transferred to the non-slipping wheel depends on the speed difference between the left and right wheels. Normal operation in slippery conditions will often have one wheel spinning faster than the other one on the same axle.

 

thanks for the fast answer and I hope my english is not to bad.

At first:

1. Make sure that the differential fluid is the correct type and at the correct level.
= all correctly, it was done by a Jeep mechanic man (?)

6. Rotate the left wheel by hand at a minimum of one revolution per second while an assistant rotates the right wheel in the opposite direction.
= it that possible in 4lo ??? or must I do it in 4hi ?
9. If a Vari-Lok does not operate properly, it has to be replaced (it can't be repaired).
= that's bad, it's so expensive in europe/germany (1.200,- €)
I will test it this weekend.
Thanks for all ! :thumbsup:

second:

Is the problem at the rear?
= rear and front

Is it true that both wheels, right and left, on the same axle are in the mud at the same time?
= yes. It was in a deep mud hole. drive forward or back was not possible.
at front and rear axle only one whell spins (4lo was shift) at all time.

thank you too :thumbsup:

At my first time in 2004 at a rampant snowtrack in austria, all wheels spins.

At this time I have drived 80778 miles, perhaps is important.

thanks all

At this weekend we have a forum meeting here: http://www.camp4fun.de/veranstaltungen.htm

There I will test it again and will posting here

Here are our forum in germany, it's a form for all offroader, my name is also MaWo.
Perhaps you have look to us ?

http://www.4x4-treff.de/

many thanks to all !!

And now I'm going to sleep, it's 00:07 a.m. here in germany.
good night

 

MaWo, could you tell me one thing? I'm searching and searching and can't find it- what is the gear ratio in 2.7 CRD axles? 3.55, 3.73 or 3.91?
The other thing about quadra-drive: your milleage is not much important, because vari-lok is virtually wearless- untill it detects slip of 2 RPS it acts just like an open diff, so the cluth pack is not wearing.
About your oil in diffs- after oil changing, have you felt any unusual things such as tires shripping etc? There is possibility that your mechanic forgot to add the LSD additive. It would then kill vari-lok quite fast, but it is impossible that you didn't felt anything.
The other thing is that you really have to check it like it was written, because maybe it is allright, but you just gave it to slow wheelspeed to engage. There is also one, very simple way to find ouy if they are working properly:
raise one side of the vechicle (for example on the wood stands), but only 1-2 cm above the ground, put something (agin some little piece of wood) under the tires on the ground, to give them some difficulty to move, then engage 4lo. Release brakes, let wheels spin slowly. If you are still suck it's ok. Then add rpm's, untill car will move and drop of the stands (this is why you have to lift it only a bit). Then you will know when your vari-lok engages enough to pul your vechicle

 

Hi mendelmax and @all !

The the gear ratio in WG 2.7 CRD axles is: 3.55:1
and in 4lo : 2:72:1


regards

Matthias

 

Thank you very much, this is precious knowledge for me- I'm thinking on swapping quadra-drive front axle as one of the upgrading options (the others are truetrac or ECTED), but I was affraid I will have to regear. Now I see 3.55 vari-lok is also available