Question about 1994 Chevrolet S-10

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My 1994 s10 won't go into four wheel drive, it did before it sat for about a month but won't now. What happened? I checked the fuse and the cable from the knob, and I can feel it going in gear in the transfer case, wheel bearings seem fine and ball joints, what happened to my 4x4?

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  • isaiah mullins Apr 09, 2011

    Ok isaw where the actuator is under the battery and I don't think it was kicking in so I'll try and find that solenoid, what's it look like and is it hard to find?

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There is a solenoid mounted near the top of the transmission inder the truck. This solenoid is known to fail, I had one go and I know others who have as well. This solenoid activates an actuator up front, usually under the battery, that pulls a cable that in turn engages the front diff. If you have a vacuum line off, it will do the same.

Check vacuum lines, check the solenoid, be sure the actuator is pulling, if you have a pushbutton 4x4 switch, those button assemblies are also known to fail. I'm betting on your solenoid.

Posted on Apr 08, 2011

  • hotrod53f100
    hotrod53f100 Apr 11, 2011

    Its been a long time, I think this is it, it should be on the top of the transfer case.
    http://www.rockauto.com/catalog/moreinfo...

    When you go into 4x4, the vacuum switch puts vacuum on that actuator under the battery. Check all of your vacuum lines on all ends, if they're OK, try a solenoid. You could even put it in 4x4 and see if you have vacuum on the line going to the actuator under the battery. There is a switch on the axle that confirms that you're engaged. Once you get it to move, it will light your dash light.

  • jimmy turner Sep 26, 2011

    it dose sound like a vacuum line make sure all vacuum lines or hooked up and no leaks .

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