The manual selector moves fine and you can hear it clicking in the front driveshaft when it moves to 4LO or 4HI position. I know the front axle lights on the drive selector used to work and now they don't light up any more. Am I looking at an electrical problem here? Or did the light quit working coincidentally? This happened on it's own, I parked it one day in 2HI and did not touch the shifter, the next day I go to drive it and I could tell it was in low gear, redlining at 35 MPH.I already adjusted the linkage and changed the transfer case fluid. I'm hoping I don't need a new T-case.. Thanks in advance for any help.
Check mate !!!! Check your vocab in your bonnet and go through your spelling words each night or stick them on your dash board ... Sure not Shure .. So close to home sounds,so familiar .. Listen learn and never assume .. Always keep your services in date as things brake down quiet easily and it's not good when you haven't got your wheels balanced so I wish you luck you might be surprised of how things do fail and I hope nature takes it cause as I'm not the actuator I'm the shimmy shakers last hope but the frizzeld engine has turned to many corners with lost mixed signals and one wheel is never the same as the last wheel .. So unbalanced but quick to move in on a poor old toe that comes with a few rags to clean the messy oil up ..
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Re: 95 chevy K1500 is stuck in 4x4 low
You should check the actuator......i am pretty shure that the actuator is gone.......termal actuators tend to fail......
if it happens to be the actuator gone bad...get a new one....they are like 168 bucks.......
but if you think the Transfer case is the problem....then this is what i would do. just to make shure that it is the problem.......park your truck "level surface" and put it in neutral.....and put the t case in 2WD. if the shaft is still engaged then it is the t case.....
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Which do you have ?
Transfer Case - NVG 236 (Two Speed Automatic)
Transfer Case - NVG 233-NP1 (Two Speed Selectable)
The NV236 transfer case is an automatic transfer case with three drive ranges. Shifting from rear wheel drive to four wheel drive is done automatically when the transfer case shift control module receives wheel rotating slip information from the speed sensors. The transfer case shift control module then engages the transfer case motor/encoder to position the transfer case from rear to four wheel drive. When the transfer case shift control module receives information that the wheel rotation is the same on both axles, the transfer case shift control module sends position information to the motor/encoder to put the transfer case back into rear wheel drive. The three drive ranges are 2HI, 4HI, and 4LO. The 2HI position is for normal driving with the rear wheels pushing the vehicle. The 4HI, position is for driving through sand, snow, mud, gravel, or heavy rain at normal or slightly below normal speeds. The 4HI engages the front axle to allow for four wheel drive. The front axle is pulling the vehicle, and the rear axle is pushing the vehicle. The 4LO range is used for off road driving, heavy snow, deep mud, or shallow fording. The 4LO is similar to the 4HI except that the gearing in the transfer case is set for low speed and high torque. The NV236 is manufactured at Syracuse New York by New Venture Gear a division of New Process Gear for General Motors.
Is the switch light on or flashing ? If you have automatic 4x4 there are several DTC'S that can set >
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 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
Pretty normal for some clunking and clanking on electric transfer cases especially if you don't use 4 wheel drive much. Its caused by the all the actuators forcing the gear shift. My 2004 yukon does it as well but works fine when in use. Gets quieter as gears are worn in. Wouldn't worry about it.
THE TRANSFER CASE MOTOR IS ONLY FOR 4WD LOW. That would have never been the problem as soon as you confirmed it shifted into 4wd Low. 2wd and 4 Hi work off of vacuum. You may have one or two issues. A vacuum leak up by the front axle that engages the 4wd HI or the sensors on the transfer case.
Try jacking up one side of the front and putting it on a jackstand. Then turn key on(but dont start it) and put it in 4hi. Try to spin the tire in the air. The drive shaft should not turn nor the wheel. If the wheel does then maybe the acuator is not moving in the axle. It worked when you pulled it out but it might be hanging up on something in the axle.
Try commanding the drive ranges while in netural cycling them. This may normalize the controller that senses the position from the encoder motor assembly. There maybe a procedure for that in a service manual.