4x4 engage be itself

[dwaters416]

On My 97 k1500 if I turn into a tight parking spot the 4x4 will engage by itself. The light in the switch will stay in 2wd. Also on bumpy roads it will do it once in a while. Where should I start looking.


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[thegawd]

on my 97 burb I have noticed that the front has like 25% power to while in rwd. I watched an emmisions tech put this truck on a dyno and it tried to jump off... I freaked out and he apologized and did the idle test instead.

I have also noticed if I'm turning at full lock the truck dosent really like it and slides a bit, it dosent jump or anything.

it's possible this is not how it's supposed to be but that's the way my truck has been since the day I bought it 10 years ago.

how do you know it's in 4x4?

 

[dwaters416]

Mine is the same way. I know it the 4wd because I can stop engage the 4wd roll forward then hit the 2wd button back up and it’s fine for and until I get into tight parking areas


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[thegawd]

that is strange indeed. I'm far from an expert here I couldnt wager a guess at all.

 

[dwaters416]

I replace the actuator and it still does it. It don’t do it all the time just once in a while.


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[alpinecrick]

Now this is interesting.

I recently had that happen with my 96 when turning into a parking lot at about 10 mph, but it was just momentarily, and the only time it has happened.

Which actuator are you guys using, electric or thermal?

 

[thegawd]

243c tcase, push button electric. as far as I know, my truck is fine.

It's not that complicated of a circuit. I wonder if you might have chafed wires that are connecting or grounding out and activating somehow.

upon recently learning how to activate 2Low by rewiring the circuit with a toggle switch, they say the light on the dash does function when activated so I kinda think if it is in 4x4, the light should activate. but I have never personally worked on the 4x4 drivetrain other than to test and change the front diffs actuator.

Al