Checking the functioning of the transfer case must be carried out in the following order.
Install the shift lever (or automatic transmission) to neutral position «N».
Place the vehicle on a lift or stands. The wheels must turn freely.
Apply parking brake (lift the lever all the way up).
Both front wheels must turn freely in the same direction.
If both front wheels cannot rotate in the same direction, then check the front axle gearbox and the PK. To check the front axle gearbox:
- disconnect the driveshaft from the front axle;
- check the front axle gearbox, both front wheels should rotate freely in the same direction;
- when rotation is blocked, the front axle gearbox must be replaced.
To check RK:
- release the parking brake;
- turn both output shafts of the RC in opposite directions;
- if they do not turn, then the RK is blocked, replace it.
- if the front wheels turn, then check the CV for the integrity of the shafts, for which it is necessary to remove the CV.