How is the 4x4 activated in the front diff of the libby? Is it like the Cherokee that locks the front diff with a cast fork that moves a collar via air pressure? Or is it something else?


N

_________________
The beauty of a 4x4 is that you can get stuck at inaccessible places
=================================

2003 Liberty Sport
Blue w/ Gray trim
3.7L 5 Speed Manual
235/70/16 BFG MT's
65w Phillips fog light mod
AmsOil fluids end to end
SkidRow Front armor
Standard Frankenlift I & Al's U A-arms

Front diff is always turning when the front wheels are turning. Front drive is engaged via the transfer case

no locking hubs, no diff locker on stock KJ's

_________________
2005 CRD "Ol' Blue"
Red Ryder carbine-action, two hundred shot range model air rifle with a compass in the stock and this thing which tells time.
My build page- RL Komodo Rear and TJM Front Bumper, armored, lifted, JBA Steel D30, 4.10s and ARB air lockers.

You must be thinking about the old XJ's b/c the newer xj's are set up just like the kj. Youre thinking of the old vacuum setup. Im not sure when they stopped using that. It was the early 90's/late 80's.

_________________
LOST KJ'S
Where are you going???
Current Jeep: 2004 Jeep Liberty
-Atlantic Blue
-Air Ride Rear Suspension ; OME/Rustys Lift ; Powertrax Locker ; Moog Lower Ball-Joints ; 245/70/16 Yokohama Geolander A/T-S's on MOABS ; Flowmaster 50 SUV
Lost #007082
http://www.cardomain.com/id/jeepjeepster

So it is always 'working' and is engaged by the t-case only? I'm not 100% clear on this.



Yep that's the system I was thinking of. My brother has a '91 (think) that has the vacuum system. The fork broke and had to be replaced with a cast iron one and a manual cable. Either way he was asking me how the system was in the libby, and to be honest, I never thought about it or had a clue.



N

_________________
The beauty of a 4x4 is that you can get stuck at inaccessible places
=================================

2003 Liberty Sport
Blue w/ Gray trim
3.7L 5 Speed Manual
235/70/16 BFG MT's
65w Phillips fog light mod
AmsOil fluids end to end
SkidRow Front armor
Standard Frankenlift I & Al's U A-arms

i had an 89 wrangler sahara and it had the vacuum actuated 4wd system in it. i switched it to a motorcraft carb on the 4.2 and got rid of all the vacuum lines and egr crap, and i guess by removing all those old vacuum lines i screwed up my 4wd lol

but a company made a kit with a cable. so when you put the transfer case in 4-low, you could have 2WD/RWD 2-LO, or pull the cable to activate the front diff then you have 4-LO. it wasnt so you can have 2-LO, but just so it was a positive engagement not depending on the stupid vacuum

_________________
2002 Cactus Green Renegade~OME HD/Rancho
235-85-16 Firestone Destination MT's~Detroit Locker~AL's 4.5 Arms
ARB bumper/Superwinch 9k~PIAA 540 driving lights/PIAA reverse lights~Crane 8.25 diff cover

OT: You're not really going to make me part of your signature, are you???

Easy to under stand just take some time to think about what I say
front tires roll on the ground in 2wd
front hub/bearing is splined ,female splines, that the tires are bolted to
the CV shaft is splined ,male splines, and is slipped into the hub/bearing that is bolted to the tires that are rolling
so as of now tires turn hub/bearing turns CV axle turns
CV axles other end is also splined ,male again, it is slipped into the carrier that has female splines
the carrier has the ring gear bolted to it and inside the carrier are the spider gears and some other gizmos that allow slippage for turning
so now we have tires on the ground turning a hub/bearing turning CV axle turning a carrier that is turning a ring gear
the ring gear meshes with the pinion gear that has male splines on it it slips into a yoke with female splines
the yoke is bolted to the pinion the drive shaft is connected to the yolk via a U-joint the drive shaft is connected to the transfer case via a U-joint
so now tires turn hub ,hub turns CV ,CV turns carrier ,carrier tuns drive shaft
all this while in 2wd

inside the t-case there are "parts" that move a chain drive to engage the front half of the case
other parts change from low to high range

so in 2wd every thing is turning just not getting power
it will only get power when you engage 4wd
no manual hub like older jeeps nor a retrofit
no vacuum disconnect like the YJ's and ,IIRC, XJ's up to '94
just good ole splines ,nuts and bolts
sure it causes things to wear faster but with technology the way it is this stuff still last 150K miles or more
and friction that would cause poor MPG is very small

hope this helps