The off-road pack includes the following

1.Fuel tank, transfer case, underbody and front suspension skid plates.
2.265/60 R18 BSW All-terrain tyres,
3.18 x 8-inch polished aluminium wheels
4.Quadra-Drive® II4WD system, rear Electronic Limited Slip Differential (ELSD)


You can get 1,2,3 with all models as accessories, however 4 is only available on the v8 variants.

I am getting it with my v6 limited along with the mopar rock rails.

Sorry, my mistanke. I meant to say I found it suprising that QDII wasn't avail on Laredo.

Ah yes, I was very disappointed that it wasn't there too, so I guess I will have to go after market, I am not even sure if diff locks would work with the QT1 and 2?

You may not need them, depending on what type of tracks you tackle? The QT2 still has traction control based wheel speed control, so, if it's smooth and fast in its operation, you might get away with it!

Given the diffs are based on Mercedes units, I'd be suprised if lockers will be made available.

Towing
 

Anyone know why the towing capacity is less for the 4x4 then the 4x2?

"10. Towing capacity

When properly equipped, the all-new Jeep Grand Cherokee can tow up to 5,000 pounds on V6 models and 7,400-lbs on V8 4x2 models (7,200-lbs on V8 4x4 models). "

I read in the Feb 2011 Overlander 4wd magazine "A generous 93.5 litre fuel capacity is made even more attractive by the fact that under the rear of the vehicle is a huge space that almost looks purpose made to take an additional fuel tank"

Let's hope one of the aftermarket mobs will take the initiative sooner rather than later on this one. I am sure the snorkel saga will not improve with the new model though.

It's been discussed elsewhere, and confirmed in the engineer chat, that its due to the "all up" weight of the vehicle. 4x4 is simply a bit heavier itself, slightly reducing the towing capacity.