4 wheel drive

Not all cherokees were fitted with a 2 wheel drive option. You should have two shift sticks in the centre console. Your normal Park, Reverse and Drive selector and a smaller, shorter stick to the left of it.
This shorter stick will show you your drive options.
If you only have the first three listed yours is permanently 4 wheel drive, sometimes called AWD, (All Wheel Drive).
Starting furthest away from the engine, they should read as...
4Lo - Low ratio 4 wheel drive used just for 'off road' driving.
N - Neutral. This disconnects ALL drive to ALL the wheels.
4 FULL TIME - High Ratio 4 wheel drive. Normal road 4
wheel drive.
"Options that might not be fitted".
4 PART TIME - Automatically switches from 2 wheel drive
to 4 wheel drive if the rear wheels start to lose grip.
2WD - Dedicated 2 wheel drive only. Power is sent to the
rear wheels.

are you in four wheel low or four wheel hi. if you are in four lo, put vehicle in neutral before trying to shift out and be at a complete stop. if you were in four hi, put vehicle in reverse and keep backing up, usually 4wd while come out and go back into 2wd

Check the soildnoid that engages 4x4 by switching it from 2 to 4 wheel drive and listen to it 27 dollar part if needed to be replaced

If your in 4 low be sure to shift into nuetral first. Otherwise try backing up while shifting to 2 wheel drive

sound like the box computer has gone

Have you tried letting up on the thhrottle at the same time you shift? That takes the load off the gears and allows the shift to freely occur. Good Luck, Ned

Have the 4wd serviced

That is up to your preference in my opinion. 4 wheel may give you a little more traction, but it can also lead you into a false sense of security. If heavy snow, and you need to get through it, you can only go as fast as the guy ahead of you anyway right? Up here in Ontario Canada, I passed by many a 4 wheel drive in the ditch, because they assumed they would have a better chance on icy roads than me, with 2 wheel drive. Remember this, no matter what you decide, you may be able to go a little faster in 4 wheel, compared to 2 wheel, but when you have to hit the brakes, or go into a spin, 2 wheel or 4 wheel drive, your not going to be able to stop it any faster. Your going to use more gas in 4 wheel too. Yes there will be times when you need to use it, but like I said, when it goes sideways or you have to lock up the brakes, because you were pushing the envelope too much,? At least with 2 wheel, you feel the back end break loose, to warn you how slippery it is, and you may not feel that soon enough, with 4 wheel. Just my opinion, but maybe some 4 wheelers have a different opinion. It's just like the experts from the skid school said up here about mandatory snow tires being talked about. If putting snow tires on your car is going to make you drive a little faster, your defeating the purpose.

aslong as you dont have locking hubs you can shift into 4 wheel high if you need 4whl low youwill need to stop and put into neuteral first and the same thing to take it out of 4whl low .otherwise you can shift on the fly or if you prefer driving hope this helps you out

If the jeep is awd, the jeep is always in 4w high.