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Originally Posted by PARAGON
I am sure the H3 and H2 are very similar but I don't follow where the transmission shift control module would be the culprit.
The transmission has to be in neutral and speed virtually zero and then you push 4HI and 4LO together for the t-case to go to Neutral.
I haven't looked it up, but it would seem that the BCM would have to recognize that the tranny is in neutral itself before it would allow for the shift to neutral in the t-case to occur.
Nite, is it just a light coming on or does it physically go into neutral.... meaning you have no more power to the wheels.
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A failed T/case controller controls the encoder motor that engages all the different 4-wheel drive systems on the vehicle. So, if there was a major failure and it did not correctly process the information from the inputs, including the BCM via the class 2 circuit, it could attempt to engage.
It could just change the indicators too without engaging or disengaging.
I'm not saying it is the problem, all I'm saying is it could be a problem, and for a fact, a well-known problem!