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Front wheels will not disengage EVER when I use four wheel drives

It works when I use it but they stay engaged year round and are doing a number on my gas mileage....plus I wouldn't think that it is too good for the hubs as well.

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This happens on these two to four wheel drive units, you need to get it to a garage that knows how to unlock or disengage the four wheel drive , doing this on your own will cause more damage.

Posted on Dec 28, 2013

  • Colin Barnard Dec 28, 2013

    great info thusfar.... after I tackle the rusty breaklines, i'm onto this

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Posted on Jan 02, 2017

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SOURCE: 4x4 wont engage

There is a switch that has twwo wires going to it, it's located just above the motor on your transfer case,on the drivers side, one plug goes to the motor and the other goes to this switch, it's the motor that shifts it into low and high range, I'm not sure what the switch is called but it tells the front end when to lock and unlock.
Hope it helps

Posted on Mar 05, 2009

  • 64 Answers

SOURCE: Four wheel drive wont engage. Tranfer case is

Sounds like you either have a vaccum leak or your 4 wheel drive actuator is not working to engage the front differential.On my 98 ram there is a black and red plastic lines that are used for the vaccum lines. They are underneath and go from the transfer case to the front axle, check to see if one or both might be cracked or broke completely.If the lines are good then it could be your actuator on the front axle. A new one is about $93 at advance auto parts and not very hard to replace

Posted on Dec 15, 2009

  • 1 Answer

SOURCE: My 1988 K1500 four wheel drive has grinding sound,

im having the same problem... 2wd works fine, 4wd lo and hi both when the engine is just above idle and the wheels spin there is a knocking and when it goes too fast its like a grinding.... ive been told it was the actuator... but ive yet to test that theory... let me know what u find out on that... id sure like to get mine fixed too

Posted on Oct 25, 2010

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1 Answer

Is there an electric or vacuum switch on a 2001 chevy blazer


There are 2 models here the push button will flash if the system is not engaging or disengaging properly . If front drive shaft is turning. That is with car raised and supported . if front drive axles do not turn then the axle actuator is not engaging axle shaft passenger side. Remove actuator and manually engage shifting collar with a screwdriver still does not turn then inner axle is twisted.

Mar 21, 2014 | 2001 Jeep Grand Cherokee

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Warn hubs, installation


Warn Hubs Installation
A truck or SUV with a four-wheel drive suspension uses locking hubs on the front wheels to engage or disengage the front axle shafts from the hubs. This way, you can drive the truck normally with just rear-wheel drive, or engage four-wheel drive mode when you want to drive off-road. These hubs can wear out, and one improvement is to install a set of Warn hubs. Installing a set of Warn hubs takes about an hour.
1.Park the truck and put on the parking brake. Lift the front of the truck with the jack and put the jack stands under the front axle. Take off the front wheels with the tire iron and put them to the side.
2.Disengage the locking hubs using your hands by turning the knob on the hubs. Remove the snap rings holding the hub locks in place with the snap-ring pliers. Pull the hub off the axle.
3.Install the lock ring wheel from the Warn hub kit in the axle with the factory snap ring and the snap-ring pliers.
4.Make sure the Warn locking cap dial is turned to the "Free' position. Install the locking cap onto the lock ring wheel and hub body with a hex-head key. Reinstall the front wheels with the tire iron and lower the vehicle off the jack stands with the jack.
Thank you for using FixYa. Hope this will help your problem and don't forget to rate me.thanks,
Reymond

Oct 18, 2011 | Cars & Trucks

2 Answers

I have a 1997 isuzu rodeo the 4x4 indicator light stays on. Transfer case is working properly. SUV is definitely in 2 wheel drive. Is this a vacuum related problem


If you jack up the tires on the front end and manually rotate the left side of front wheel, the right side should remain stationary if the 4-wheel drive is truly disengaged.

Once you confirm that, check that the connector to the actuator switch is ok. It's mounted on the front axle on the drivers side. Check all the vacuum hoses attached to it as well.

Apr 09, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

08 f150 4x4 on front end only one side is disengaging when in 2 wheel drive. The problem is when engaged into 4x4 wheel drive the front drive line spins and both sides engage but only the back wheels spin...


If I read this correctly ( which I might not have, bit early for me ), the front drive shaft will engage ( from the transfer case ) but the front wheels are not engaged ?

If so, sounds like either the vacuum from the IWE ( Integrated Wheel End ) is not being released, or the IWEs have had an issue with part vacuum ( damage vacuum lines ) and the IWE gear is rounded off.

If you pull the vacuum lines at the IWEs ( there are 2 lines, 1 is the vacuum line, the other is the vent tube that routes up into the engine compartment and is not attached to anything ), the front wheel should engage ( might need a 5 * turn to mesh the gears ). With the vacuum lines off, jack up the front axle ( take precautions, chock the rear wheels, parking brake, jack stands, etc ) see if the front wheels are engaged ( turning one wheel should turn the other ). The option is to do this after the truck has sat over night, and the vacuum has been released out of the vacuum reservoir.

If the wheels turn correctly ( engaged ) I would think the contact plates in the transfer case are not making contact. Good starting point for this is the connector on the side of the transfer case, some times this gets gummed up, and the pins do not make good contact. The contact plates in the transfer case are used for a few things, one of them is to signal the IWE solenoids to release vacuum to the IWEs.

Operationally vacuum holds the IWE ( Integrated Wheel Ends ) out, and once vacuum is removed the spring engages the IWE.

Here is a black diagram of the IWE vacuum system
sscullys_108.jpg

Feb 05, 2011 | 2004 Ford F150

1 Answer

I can't Desactived the four wheel drive where is the switch for the four wheel drive, is a GMC YUKON DENALI 2007


{: ) If your vehicle has an AWD (All-Wheel Drive) feature, engine power is sent to all 4 wheels all the time. This is like four-wheel drive, but there is no separate lever or switch to engage or disengage the front axle. It is fully automatic, and adjusts ityself as needed for road conditions.

Jan 07, 2011 | 2007 GMC Yukon Denali

1 Answer

How does the four wheel drive on my jeep work or lock in?


If you have a CJ or Cherokee, when you move the 4x4 lever, it engages the transfer case which then transmits power to the front as well as the rear wheels. For most (99%) of all four wheel use, you use the front position on the shifter one notch behind the two wheel drive setting. Use 4 low only for pulling vehicles out of mud etc and don't drive in that range. If it sticks in 4wd after disengaging it, usually backing up about twenty feet will help.
If you have a Grand Cherokee, the 4x4 usually is a quadratrack unit. That one stays engaged but only goes into 4wd mode when the rear wheels begin to slip. (by itself). Rules for using low are the same.
It is very important to run the exact same size and style tires on any 4x4. It is mandatory on quadratrack units. Use of odd sized tires can cause driveline damage.
There are variations on different year vehicles but the basics remain the same.

Sep 01, 2010 | Jeep Cherokee Cars & Trucks

1 Answer

My four wheel drive doesnt work in my 87 s10 blazer , like when i put it in park to put it in gear the shifter on the floor goes into gear but the four wheel drive doesnt turn on ? is there any fuses or...


sounds like either a fuse or the do u have locking hubs that need to be engaged also when using 4 wheel drive there is actually only 2 wheels turning usually passenger front and driver back sometimes u also have to drive backwards to engage and also disengage 4 wheel drive finally it may be a transfer case problem check drive shafts and u joints make sure they are engaged

Oct 23, 2009 | 1987 Chevrolet S-10 Pickup

3 Answers

1998 Ford F-150 4-wheel drive won't engage


lock it in and jack up and see which part isnt locked
transfer, front end
front end uses vacuum actuater
and transfer uses a electric motor
front driveshaft shouldnt turn when in park and front wheels off the ground
front wheels shouldnt turn with one wheel up

Feb 06, 2009 | 1990 Jeep Wrangler

1 Answer

95 blazer 4x4 4 wheel drive not working


There is a vacuum actuator mounted on the front differential that locks the shafts to engage four wheel drive.

Jan 28, 2009 | 1995 Chevrolet Blazer

2 Answers

2001 Trooper: Front axle will not engage when I press dash 4x4 switch


hi guys i would check all the small vacume pipes that conect the sol valves toi the vacume actuators having just replaced the engen in mine i found that these do not have any clips holiding them on tight and can get oil on them and become oversized and leak you can test the diaframes in the actuators by putting a length of pipe on one port and sucking by mouth you can hear the actuator move and then find you can put toung on end of pipe and it will hold a vacume if it does not then chances are the actuator diafram id u/s hope this helps bill

Nov 09, 2008 | 2001 Isuzu Trooper

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