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Hello I'm new to this. My 09 colorado has a 4wd issue for a while it would grind going into 4wd then it stops engaging. I changed front actuator and if you jack trucknup and engage you can see the front axle is engaging and if I go to 4-low the transfer case does its job and changes ratio in tje rear end. But this issue is the transfer case isn't engaging the driveline to tje front axle .. I listened to see if the transfer case motor was working I think I heard a click but not sure. Could it be the TC motor is weak and not engaging fully or if not what else in tje TC could be causing the problems with engaging tje drive line..thanks to all
 

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Welcome to 355Nation.

Are you trying to engage 4HI while not moving? Manual specifies truck should be moving before engaging the 4HI, not sitting still. Or did you mean you jacked up front and rear to get both off the ground and engaged while idling in drive?
Just trying to understand.
 
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