Help me understand how the front axle/transfer case works.
#1
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Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
Help me understand how the front axle/transfer case works.
I can't seem to grasp what happens when you take the transfer case (NP231) out of 4WD and go back to 2WD. I'm assuming the front driveshaft is disconnected from the transfer case with some sort of mechanical linkange inside the TC, but do the front wheels continue to turn the front axle, diff, and driveshaft as the vehicle moved forward, or is there a vacuum-actuated disconnect system in the front hubs or diff?
Sorry for the stupid question, but I can't exactly stick my head down there while I shift the TC driving down the street.
Sorry for the stupid question, but I can't exactly stick my head down there while I shift the TC driving down the street.
#2
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Year: 1988
Model: Cherokee
Engine: 4.0
On your 98 there is no vac disconnect in the axle. Basically the tires are turning the axle shafts which turn the gears which turn the drive shaft, then at your transfer case the driveshaft is disconnected from the drivetrain inside the transfer case.
#3
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Year: 2001
Model: Cherokee
Engine: 4.0
In most cherokees, when your in 2wd, your hubs are always engaged and spinning. They spin your shafts, shafts spin the gears, pinion spins the drive shaft. That's why some axles have locking hubs so you don't spin everything going down the road in 2wd.
Never really took apart a t-case before but there's a shift fork that engages and disengages the power going to the front axle. Someone will probably chime in with more info.
Never really took apart a t-case before but there's a shift fork that engages and disengages the power going to the front axle. Someone will probably chime in with more info.
#6
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Year: 1989
Model: Cherokee
Engine: 4.0 renix
It certainly doesn't help, but I had a 96 with the front ds removed since the tc didn't work and I was lazy cuz it was a beat up xj anyway - and it really didn't get much better gas mileage from what I remember, maybe 1 or 2mpg better at the most I would think, if anything.
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Year: 90,84
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Engine: 4.0,2.5
I can't seem to grasp what happens when you take the transfer case (NP231) out of 4WD and go back to 2WD. I'm assuming the front driveshaft is disconnected from the transfer case with some sort of mechanical linkange inside the TC, but do the front wheels continue to turn the front axle, diff, and driveshaft as the vehicle moved forward, or is there a vacuum-actuated disconnect system in the front hubs or diff?
Sorry for the stupid question, but I can't exactly stick my head down there while I shift the TC driving down the street.
Sorry for the stupid question, but I can't exactly stick my head down there while I shift the TC driving down the street.
I get 20 or better highway, with 280K on my Stock 90! (746 injectors though)
#9
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Year: 1989
Model: Cherokee
Engine: 4.0 renix
This is really the only thing that will ever make a difference past routine maintenance. I should have gotten around to doing it already but just haven't had the time. Top of my list for springtime.
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