BlackWorksInc
New member
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They wanted me to take the truck back and just be OK with it not having 4 wheel drive. They said they were able to open up the actuator assembly and physically reset the actuators to two wheel drive. They said they were afraid to flip it into 4HI to test for fear that it won't switch back out of 4HI.
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I'm not convinced that it's an actuator problem at all. The actuators are physical mechanisms that only activate when given the signal to do so. The signal came from somewhere other than the 4x4 selector switch which makes me think that they caused some sort of electrical problem that impacted the ECU. The TSB that [MENTION=66389]BlackWorksInc[/MENTION] posted above leads me to believe that there is a separate ECU that governs the 4x4 system and that could be the one that's fried. The dealership admits that they don't know 100% for sure what the problem is and that they are just guessing.
They opened up the actuator? Well you need a new one now for sure if they messed with the gears, there's no factory literature that talks about how to re-time them nor has there really been any repeatable success on the forums when attempting to do so. So unless they somehow have documentation that shows what timing is supposed to be (and honestly if they do I'd LOVE to have that for my records) then they just potentially ruined the actuator.
It could be the 4WD ECU, the thing lives under the glovebox attached to the black kick panel that is just under the glovebox. Again, I have no idea how they could have messed it up by doing heads as the 4WD ECU is under the glovebox and the actuator is on the transfercase. So unless they disconnected the two I am not sure what they could have done. But then again, I have seen people do stupide things...