Gets stuck in 4wd

check for a stuck or faulty actuator

check that the brake reservoir is not overfull ( past the full line)
remove cap and bleed excess fluid out
bleed the brake lines to relieve the pressure
replace the faulty brake master cylinder ( blocked compensating ports )

Did you fix the E brake problem? Replace the rear cables or cut them at the rear brakes. To much pressure on the T case can keep it from shifting. Especially from 4 low.

Hi i have rexton 2008 used to have a problem with 4wd check light. 4wd check light course faulty vacuum pressure velve.thee valve is located between the front left light and the battery,is mounted under the battery stand. Got two small pipes going to the gear box.

The encoder motor that shifts the transfer case might be INOP. Try backing up slowly as you try to disengage 4wd. If still stuck you may need to replace that motor.

Take the transfer case apart and find out what is broke.

Yes check the fluids, check the 4WD lever linkage and see if its not binding/bent or stuck with mud.

check oil level in transfer box first.this car is designed to come out of 4wd at around 21mph on its own. you may need to get electronic diagnostic machine check..

possible range selection detent switch not working causing to get stuck some times in one range only and wont shift to other range 4wd light in dash just keeps flashing for about 10 seconds then goes to previous state this then can jam up 2wd 4wd lever that you then cannot move.
there are 3 switches 2 on trans/transferr case, 1 on front LH diff axle tube actuator (shift on fly). can cause damge to the electric actuator then on transferr case.
suggest you get a dealer to look at or some one that knows this system. is also vaccum operated on front diff shift on fly unit and there were 2 different systems fitted to these vehicles push button 4wd on dash and lever next to gear lever which i take is yours

check the vacuum switch and lines...