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On that vehicle the wheel sensors control the four wheel drive with is nothing but traction control if the sensor are bad it can lock in and not come out the transfer Case has a solenoid on it also the toggles it it also can be stuck I would start bye checking relays first and move from there hope this helps
Does it shift to 4wd high range ? If so then shift to 2wd . What is going on here is the transfer case motor is stopping due to the motor position sensor has gone bad which means that you replace the transfer case motor assembly. But if you wish to make it a 2wd for awhile then remove motor and manually turn shaft . This can be done by raising and supporting rear axle truck in park remove motor turn shaft slowly with pliers and rotating the play in drive shaft. There are stamped markings on back of case showing gear positions..
it has to be running and in neutral to engauge the 4x4. shift to neutral,then push the 4x4 option that you want. 4wheel high you can use almost any sensible speed.4wheel low is only for low speed 15 to 20mph is best for 4wheel low,otherwise will damage engine or transfer case. when you take it out of 4x4 it has to be in neutral also. thank you for choosing fixya.com
See Handbook you should stop car before selecting low ratio box-4 wheel drive can be selected on the move (up to 60mph)----How often do you need to select 4wheel or low ratio???
you may have a broken transfer box or a damaged locking hub on the wheels that arent used in 4x4 mode, i.e. if your car is FWD unless its in 4-low, check the rear locking hubs for failure. Other wise it sounds like a transmission fault in the aforementioned transfer box or differential.
hey charlie, 1st problem is 4 wheel drive being engaged on dry pavement. You should only have it in 4x4 in snow, or off road on sand, dirt,etc. Newer all wheel drive vehicles compensate for the tires rotating at different speeds, like going around a sharp corner. The wheels on the outside of the turn have a longer distance to travel than the wheels on the inside of the turn. This results in the vehicle feeling like it's jumping, hopping or jerking as you cut a tight turn. You can damage your 4x4 system, as the wheels are fighting each other, trying to turn the same # of rotations, and something can and will give (like blowing the transfer case). If your light is staying on after changing to 2 wd, it is possibly stuck in 4x4. To shift from 4wheel to 2 or 2wheel to 4, you should be traveling in a straight line, let off the gas, change in or out of 4x4, resume driving. 4x4 low range requires a complete stop to engage.
Ford has 2 types of 4x4 system engagement. One is a knob on the dash that you just turn to 4wheel drive high or low. The other system is the 4x4 transfer case shift on the transmission tunnel (hump) between the driver and passenger seats. To shift into 4 wheel drive high while driving, just let off the gas and shift transfer case into 4H position, and continue driving. To shift into 4 wheel drive Low, stop the vehicle completely, put transmission in neutral, shift transfer case into 4Low position, put trans. in gear, and start driving. I am assuming before doing the above, you have locked in ( turned the front hubs to 4 wheel drive position.) Any further questions, let me know.
Your blazer is equipped with a shift on the fly four wheel drive. That means that at speeds less than fifteen miles per hour you can shift into or out of four wheel drive by simply pushing the four wheel high button. If you wish to shift into four wheel low. Stop, put the transmission into park or neutral, and push the four wheel low button. Same procedure for shifting back out. Never shift into or out of four wheel low while moving. And be careful in four wheel low. At full throttle your still barely moving, you don't want to blow your engine up!
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