Question about 1992 Chevrolet C1500
Shifts into 4 high and 4 low,but won't engage into 4 high or 4 low. I'm not sure if the hubs are bad or it's a bad sensor,I don't know how to check if the hubs are bad or how to check the sensor
I have a 93 full size blazer and might be able to help. First you need to ensure that your are actually not engaging the hubs. To do this, shift into 4H or 4L and try to turn very sharply. If it is difficult to move forward with the wheel turned all the way, you are probably in 4WD and the indicator light may be out.
If the truck drives as it does in 2H, your front diff is not engaging. If this is the case, there is a thermostatically engaged actuator that may have failed. These fail occasionally and can be purchased at most auto part stores or at the dealership. Before you buy a new one, use a voltmemter to ensure that voltage is present at the actuator when you engage 4H or 4L.
I know several companies make a manual pull cable style activator that can replace the thermostatically engaged unit.
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Posted on Jan 01, 2009
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Posted on Jan 02, 2017
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