4 lo works 4 hi doesnt new transfer case driveline

If the actuator is not working and you need to engage your 4x4 to get home, you can manually lock in your 4x4 system using the front axle's manual locking hubs (assuming your vehicle has manual locking hubs). Here are the steps to manually lock in your 4x4 system:

1. Locate the manual locking hubs on the front wheels of your vehicle. They are typically located at the center of the wheel hub, and will have a dial or lever that you can turn or pull to engage the hub.
2. Make sure your vehicle is in neutral, with the parking brake engaged.
3. Turn the dial or lever on each manual locking hub to the "lock" position. This will physically engage the front axle, allowing power to be transferred to the front wheels.
4. Engage your 4x4 by shifting the transfer case lever into the appropriate 4x4 mode (4-Hi or 4-Lo).
5. Test your 4x4 by driving slowly in a straight line. If you hear any grinding or feel any vibrations, stop immediately and check your manual locking hubs and 4x4 system.

It's important to note that driving in 4x4 mode on dry pavement can cause damage to your drivetrain, so be sure to disengage your 4x4 system and unlock your manual locking hubs once you're back on solid ground.

THERE IS AN ACUATOR ON THE FRONT DIFFERENTIAL VERY EASY TO CHANGE CHECK THIS PART

if you have the hub locks in ,it will If you have the hub locks out but the transfer case in 4wd it will If you have the transfer case in 2wd and the hub locks out then it may still turn slowly /intermittently from the oil /grease friction driving it.

old dog , jeep, sure.
its a PART TIME 4wd, not AWD.
you post but forget (100s like this here) with no road surface stated.
dirt, ice, snow, off road, pavement. what??

my wild guess, is this car is new, to you,
and you never read the operators guide yet.
lost 25 years ago, but sold on fleabay
PT-4wD
do not drive on pavement dry , or you WILL wind it up.
WHEN I SAY 4wd I MEAN , the front lockers are locked AND
the transfer case is in 4wd.

Here is the best page on the net for PT-4WD
here we go , WINDUP. 101

http://www.rubicon-trail.com/4WD101/driveline-bind.html

answer, is , DONT DO That.

The hubs engage by vaccum, you probably have a leak somewhere, the problem is it doesn't have to be leaking at the modual, anywhere on the engine that there is a vaccum line can cause this problem. If this is a truck that you like and want to keep for a long time you should consider swithing over to manual hubs they never fail and you'll save a ton of gas when your running in two wheel drive.

Bad u-joints at front driveline and/or u-joints at axle connection from behind rotors- going into front differential. Need new u-joints at either the driveline front and back (going into differential or to Transfer case) or the Left and Right side axles going into the differential. Put Locking (or "Lock-outs) hubs on front axles... WARN brand are best... about $75 a pair and you can do it yourself, easily.

4x4 selonoid switch in the transfer case was gone

Just to clarify, the "transmission" is not stuck in 4-Lo. It is the "transfer case" that is attached to the transmission that actually engages the 4-Hi and 4-Lo modes. To properly shift your vehicle into 4-Lo, you know that you have to shift the transmission into neutral and slow down to less than 5 mph. Once your vehicle slows down to this range, your can switch your transfer case into 4-Lo mode. Due to the inner workings of the transfer case, the actual shift into 4-Lo may take a few seconds to complete. This is normal and does not signify that there is an issue. All transfer cases that have 4-Lo mode will act this way regardless of the make or model. To make a long story short, to shift out of 4-Lo you must follow the same steps that you took to shift into 4-Lo, just in reverse order. Switch the transfer case to 4-Lo mode if it isn't already there. Slow down to less than 5 mph (your vehicle must be moving, though). Then, shift your car into 4-Hi or 2WD. Give your vehicle several seconds to complete the shift. The transfer case indicator light will flash until it is complete. When it does complete the shift into the new gear mode, you will most likely hear a "clunk" (the range sleeve inside the transfer case disengages from its mating spline) from under your car. Again, any transfer case with 4-Lo (regardless of make or model) will exhibit this same noise. This should help you get out of 4-Lo. It is good practice to shift your car into and out of 4-Lo at least a few times each year to keep all of the splines free of corrosion and build-up. Based on the age of your vehicle, your transfer case may also need a complete flush and some new transmission fluid. Hope this helps.

no nothing like that ''it sounds like an al-su-layer that locks the front end in' its in the front on the front axels' some are lec-trik they have a wire that plugs in on it'' you cant miss it'' some run off a vacum check that or the lick-eeg on the transfer case to'' name is james e-mail me back if i can help some more [email protected] sarry my spelling is not all that grate'''