I have askt i my home country, Sweden, in several different forums.
But have not got an answer yet.
I bought my KJ 2.8 CRD 2006 brand new.
One of the last before KK.
I am very pleased vith my Cherokee.
I am a member of the Swedish Jeep Club.
But I wonder why it not is possible to drive lowrange with open diffrential.
It is possible on my Land Rover Td5 PU -04.
Both have TC, which I am ver pleased with.
But in my Samurai have I axlelockers.

I hop you can understand my english.

In 4LO both the front and rear drive shafts are locked together (in either the Command-Trac or the Selec-Trac cases). The open differential just balances the distance traveled by the two wheels on that particular axle. Because the drive shafts are locked, the front and rear axles need to travel the same distance; there is nothing to balance any differences between them.

You can drive in 4LO on "slippery surfaces" such as loose dirt, gravel, mud, etc. The slippery surface will allow the two axles to slide a little relative to each other when they otherwise traverse different distances (such as when turning). On dry surfaces with good traction, however, the tires will fight the locked drive shafts when you turn. Of course, if you are going to be driving in a perfectly straight line, there would not be a problem, but if you ever needed to turn, the paths of the front and rear axles will diverge and something will have to give. Hopefully not the transfer case...

If you have the Selec-Trac case, there is an "inter-axle" differential in the "4 FULL TIME" mode which will accommodate the problem of the axles not taking the same exact path.

Vehicles with traction control often have the "inter-axle" differential engaged at all times. On dry pavement they work like the Selec-Trac in "4 FULL TIME" but when the TC is engaged, the TC system monitors the anti-lock braking tone rings and apply the brakes to the wheels that are slipping, thereby forcing the wheels that have traction to turn instead.

From what I understand, TC on the 2006 KJ does not change the transfer case function of locking the front and rear axles together in 4LO.

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2005 Liberty Limited CRD; Air Filter Monitor; Samco Hoses; GDE HOT Tune; RL037142AA TC; KJ Interior Rack from All J Products; JBA Adjust-a-strut lift and A-Arms; 245/75R16 Firestone Destination ATs on Moabs; ARB Bumper; ASFIR Skids; FS-2500 Bypass Filter; ARP studs.
2016 Grand Cherokee Overland CRD.