Question about 2000 Chevrolet Blazer

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Transfer case it locks in but wont turn

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Probably has a broken chain, or is function normally and you are trying to tur the entire drivetrain by hand

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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3 Answers

99 Ford F-150 won't go into 4wheel drive I looked undernieth and front drive shaft is not turning


Someone will have to go under and check the linkage is working when the 4 wheel drive is fully engaged and not just moved to a neutral position.

Dec 04, 2014 | Ford Cars & Trucks

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Have a 1985 chevy s10 pick up & the 4 wheel drive wont engage. I already replaced the solenoid on top of the transfer case, & it still wont engage. I can hear the transfer case engage & I have vacum at the...


Make sure that the vacuum hose connector is connected AND connected correctly at the transfer case and at the front differential. If that is all right and the front differential still doesn't engage, then you need to test the vacuum actuator at the front differential.

Oct 25, 2013 | 1985 Chevrolet S-10 Blazer

1 Answer

98 Nissan frontier,4wd wont engage,lock in hubs manualy but they will not engage


If you have turned the lock tabs until they click in or out which ever the case may be for 4wd drive then maybe the transfer case is not selecting 4wd If it is vacuum actuated or electronic operation I would be checking their actions be for e I went any further.

Sep 08, 2013 | 1998 Nissan Frontier

2 Answers

F150 4x4 lock in hubs and manual lock transfer works in 2h wont in4h or 4L No grinding ,light in dash is on hubs lturned to lock but nothing.


is the lever moving on transfer case or is it a inturnal silanoid?
fords are easy fixers.. if that moving then reach in to the front u-joint see they are locked if not fix that hub,, if good the shift fork in the case is broke
you can split the case with it on the truck $25 for a fork last time i fix one
just undo shaft, speedo, c-ring cone cover, center case bolts torq size?

Jan 25, 2012 | Ford F-150 Cars & Trucks

1 Answer

Transfer case on 2006 F150 will engage but no power to front wheels?


SOUNDS LIKE A BAD HUB TRY THIS TO DIAGNOSE THE PROBLEM

Put the transmission in park, set the parking brake and raise the chassis so one of the front wheels is off the ground while the other is still on the ground. When the transfer case is in two-wheel drive, the hubs should be released allowing the wheels to turn freely when spun by hand. If the axle shaft turns when you spin the wheel, it means the hub has not disengaged.
To check engagement, rotate the axle shaft backwards. This should lock the hub. Try turning the wheel by hand again. The axle shaft should now turn with the wheel if the hub is locked. If the hub fails to lock, the hub will have to be disassembled and inspected or replaced.
To check release, hold the axle shaft steady and rotate the wheel backwards. You should hear a click as the locking mechanism slides back out and disengages the hub. Rotate the wheel forward again and it should turn freely.
Another way to check the hubs is to raise the vehicle on a frame contact lift so all four wheels are off the ground. Then start the engine and place the transfer case in four-wheel drive and the transmission in drive. If the front wheels don't turn, look at the front axle shafts. If both shafts are turning, but one wheel is not, the problem is a bad hub on the wheel that isn't turning. If the front driveshafts are not turning when the transfer case is in four-wheel drive, the problem is inside the differential (broken side gears) or the transfer case (broken chain, shift linkage, etc.). If the driveshaft between the transfer case and differential is turning, the problem is in the differential. If the driveshaft is not turning, the vehicle is going to need repairs to the transfer case.
Hope this helps.

Dec 28, 2010 | 2006 Ford F-150

1 Answer

95 nissan 4x4 truck. four wheel drive light comes but does'nt en


the front axles have pinon gear box that the shaft from the transfer case goes to, it has a vacuum hose to it or a solenoid actuator check these for proper function this is how the power is turned on to the wheels.

Feb 13, 2010 | 1990 Nissan Hardbody King Cab

1 Answer

Stuck in 4WD low


If you have an electric shift transfer case, (little knob to change to 4x4), then the motor may have gone out. There are several fuses and relays associated with the 4x4. Check all of the fuses, replace any that are burnt out. You can not check relays, so you will have to replace them. If this does not solve the problem, then the problem could be in the 4x4 mini-computer, or the motor could be burnt out, or the transfer case could be locked up. On most ford transfer cases you can take off the bolts that hold on the electric shifter motor, and manually turn the knob that changes from 2x4-4x4. If that know will not turn with the vehicle in neutral, the transfer case may be locked up. If it is not the transfer case, look into finding a new motor for the transfer case.

Jan 26, 2010 | 1998 Ford Explorer

1 Answer

Denali slips in and out of 4x4


How may buttons for the 4X4 two , three , or four ? Do the lights flash ? Any messages - service four wheel drive system ? Which transfer case does it have ?

Transfer Case - NVG 246-NP8 (Two Speed Automatic)
The transfer case shift control module uses the VIN information for calculations that are required for the different calibrations used based on axle ratio, transmission, tire size, and engine. The system does not know which calibration to use without this information.
Transfer Case Encoder Motor
The transfer case encoder motor consists of a permanent magnet (PM) DC motor and gear reduction assembly. It is located on the left hand side (drivers side) of the transfer case. When activated it turns the sector shaft of the transfer case (clockwise or counter clockwise) to shift the transfer case. The encoder motor is controlled with a pulse width modulated (PWM) circuit within the transfer case shift control module. This circuit consists of a driver on both the Motor Feed A and Motor Feed B circuits. The encoder motor is bi-directional to allow the motor to shift the transfer case from 2HI or 4HI to NEUTRAL and 4LO positions.
Transfer Case Encoder
The encoder is mounted to the transfer case encoder motor assembly and is replaced as an assembly. The encoder converts the sector shaft position (representing a mode or range) into electrical signals inputs to the transfer case shift control module. The module can detect what position the transfer case is in by monitoring the 4 encoder channels (P, A, B, and C). These inputs translates into AUTO 4WD, 2H, 4H, NEUTRAL, and 4L or in transition between gears.
Transfer Case Motor Lock
The transfer case motor lock is used to provide a 2H, 4H, and 4L lock-up feature. When the lock circuit is energized, the transfer case encoder motor is allowed to turn. When the transfer case is placed 2H, 4H, or 4L the motor lock circuit has no power provided to it and the lock is applied. This assures that the transfer case remains in the current gear position. When AUTO 4WD is selected the motor lock remains applied until an adaptive mode (torque is applied to the front propshaft) is required. During an adaptive mode the motor lock circuit is energized and the motor lock is released, enabling the encoder motor to turn and apply torque to the front propshaft.


SERVICE indicator (4WD/AWD) Lamp
The SERVICE indicator (4WD/AWD) lamp is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle of malfunctions within the automatic transfer case (ATC) system. The SERVICE indicator (4WD/AWD) lamp is controlled by the transfer case shift control module via a Class 2 message or by a Sevice Indicator Control Circuit.

The first thing to do before assuming it's a loose wire would be to have it checked for codes , auto zone , advance etc... can not check this codes .
DTC B0768 Service Indicator Circuit High
DTC B2725 ATC Mode Switch Circuit Malfunction
DTC C0300 Rear Speed Sensor Malfunction
DTC C0305 Front Speed Sensor Malfunction
DTC C0308 Motor A/B Circuit Low
DTC C0309 Motor A/B Circuit High
DTC C0310 Motor A/B Circuit Open
DTC C0315 Motor Ground Circuit Open
DTC C0323 T-Case Lock Circuit Low
DTC C0324 T-Case Lock Circuit High
DTC C0327 Encoder Circuit Malfunction
DTC C0357 Park Switch Circuit High
DTC C0362 4LO Discrete Output Circuit High
DTC C0367 Front Axle Control Circuit High
DTC C0374 General System Malfunction
DTC C0376 Front/Rear Shaft Speed Mismatch
DTC C0387 Unable to Perform Shift
DTC C0550 ECU Malfunction
DTC C0611 VIN Information Error

If you know nothing about this , your best bet would be to take it to a qualified repair shop .

Apr 29, 2017 | 2000 GMC Denali

2 Answers

I have a 97 chevy tahoe and the 4x4 wont lock in i just replaced the actuator and it just blinks on 4x4 . i do have 12 volts @ the harness to????


Your transfer case could be locked up. Try pulling the shifter motor (servo) off of the transfer case and manually shifting the vehicle into 4x4. Make sure to block the wheels as it will roll if you shift into neutral. If you cant shift it, you need to have a professional look at the insides of your transfer case.

Dec 22, 2008 | 1997 GMC Jimmy

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