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.

    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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