So guys, I just popped my front diff.

Bang
Scrunch
Wheeee
#smell of hypoid oil#

Haven't pulled the skids yet, but called a couple of wreckers just to see, and one guy is telling me that his diff is 2x the other's price because 06 and 07 kj diffs are different from other years? I called since I have never heard this before. Any truth that I missed before I keep looking?

I don't know how accurate this is, but I've been told that Pre-2006 were available with limited slip differentials, where 2006+ were only available with open differentials. I don't know if parts are interchangeable.

Wouldn't that LSD be in the Corporate rear?

I'm am thinking about putting a torsen or truetrac helical gear LSD in the front.....

AFAIK, all 02-07 Jeep Liberty KJs use the same aluminum front differential case.
And all of them are open diffs.
The only differences are gearing.
Some 4cy gasser models have 4:10 gears.
All the V6 gassers and CRDs have 3:73 gears.
Some of the V6 manual trans KJs have a different gear set.

The 4cyl models, both diesel and gas, use different mounts and CV axles.

06-07 rear axles use a open diff because they have the traction control system and ABS sensors at each wheel.

Most 02-05 models have a limited slip in the rear diff (no traction control) and a single ABS sensor over the diff.

The aluminum front case is a Dana 30a.
Most common Dana 30 parts will fit, except for the ring and pinion. The pinion shaft is longer and a standard Dana 30 set will not fit.
AFAIK, the only source for a Dana 30a ring and pinion is from Mopar. $$$

........Snip.......the truetrac drives me nuts, I never know if it's really doing its job. But that's on ice and deep snow...

We need a parking brake in the front end too so we can power over them without, say, popping the diff not that I have ever done this. Again.

Yeah lol, I wonder if the locker will be harder on the front dif than the truetrac? I know if you let a tire spin much and it gets traction all of the sudden, boom goes the aluminum housing...