Question about 1996 Chevrolet Blazer

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4x4 want enage light doesnt come on

The transfer case works just want lock at front axle

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There is a vacuum switch on the transfer case that goes bad. Check to see if you have vacuum to the actuator for the front axle when it is engaged. The actuator is located on the right fender area under the battery I think. Check the hose also.

Posted on Dec 10, 2008

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My transfer case spins when put into 4x4 but wheels don't lock into 4x4 on 96 jeep wrangler. Any idea why?


first , is the front prop shaft spinning, in 4wd
if yes, the front axle locks are bad.
if not , the transfer case , is not entering 4wd

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My 4x4 is not engaging on my 2004 Chevy trailblazer, any ideas?


Assume for an instant that the transfer case is actually working. The next area to check is the hub actuators or that the front hubs are actually engaging to drive the wheels. Remember it requires both hubs to be locked in for the 4x4 to work or else if only one hub is locked then the front diff will work and all the drive will be to the wheel that is not locked in
The cost to check is really cheap. just jack the front off the ground and see if both wheels are engaged . Do this by placing in 4x4 and have a friend hold a wheel while you turn the other wheel or try to turn the other wheel. BY holding one wheel ,if the hubs are locked in then you will not be able to turn your wheel. Ensure that the transmission is in gear as if you are driving the vehicle.

Feb 10, 2015 | 2004 Chevrolet TrailBlazer

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Feb 24, 2010 | 2006 Ford F-150

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4x4 lights on dash come on,transferr case kicks


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Dec 20, 2009 | 2001 Ford F150 Styleside SuperCrew

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I have a 1997 F150 4X4. The front axle won't enage


I also have a 97 F-150 4x4. If that was my truck I first would change the fluid in the transfer case. See if that helps loosen it up. It is possible that it has the wrong fluid in it.

Oct 28, 2009 | 2004 Ford F150

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1991 F150 front axle not locking in.


Front hubs need to be taken off and inspected for damage,
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Jan 12, 2009 | 1989 Ford F 150

1 Answer

4x4


There are two parts to the 4X4 engagement. One part is the transfer case actually shifting into four wheel, and the second part is the front axle engaging.
If you have a manual shift, as long as the linkage is working, the transfer case is engaged and the problem will be in the front axle. If you have an electronic shift, you can determine if the transfer case is engaged by the lights on the switch. If the switch lighting is correct, the problem is in the front axle. If the lights are not correct, reset the encoder motor module (located behind the ash tray, listen for the clicking when you press the 4X4 button) by disconnecting it for a few seconds and reconnecting it. If this doesn't correct the problem, it's probably the encoder motor. (located on the driver's side of the transfer case) After you change the encoder motor you may have to reset the module again.

Front axle-verify the servo (either air or electric) is operating the clutch fork in the axle by removing the cable end in the axle. Sometimes it's a small shear spring that breaks. Otherwise, usually it's the shim kit and/or fork that need to be replaced. Parts are cheap, but it takes some time because you have a lot of parts to remove.

Jan 03, 2009 | 1996 GMC Sonoma

1 Answer

1996 truck. 4wd light comes on sometimes but front axle doesnt lock in


On the front axle is an electronic solenoid that plunges in or out to engage or disengage the front drive axle for 4x4 operation.There is also a corresponding switch on the transfer case.I would replace the switch and the front axle solenoid.Over the years,i have applied this repair to dozens of Chevy trucks with successful results.There is also a GM Technical Service Bulletin on the transfer case switch,as it has been known to accidentally command the front axle into 4x4 mode at interstate speeds and completely wipe out the front axle.Good luck.

Jul 19, 2008 | Chevrolet Silverado 1500 Cars & Trucks

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