Electronic 4x4 shift?
I have a 1997 Yukon with 225000KMS. I bought the truck with the 4x4 not working and i am trying to diagnose the problem so i can buy the right parts for it and take the right course of action.
It has the electronic shift on the buttons on the dash (2HI 4HI 4LO)
when i push the 4x4 button, the light for 4 hi blinks but never stays solid, and the front wheels do not engage at all. If i put the truck into "4LO" the transfer case puts the gearing to "low range", however the light constantly blinks and the front wheels do not engage.
I know there are 2 actuators, one for the transfer case and one for the front axel or diff or something. I am wondering if it might be one of these 2 actators, or if it could be something in the transfer case, or what?
If anyone heere has had any experience with this, please let me know what you think and what i should check for. when the vehicle is in 2wd should the front drive shaft turn? I haven't checked whether or not it does but i am thinking of checking that.
Any assistance (that isn't a form of advertising for any auto parts website) is greatly appreciated
well if your transfer case is going into low range then the T/C is operational.... i would check the front diff actuator, unscrew it and shift to 4wd and see if it extends.. may take a few seconds as it uses a heater to het up oil and expand to actuate the front diff.... odds are the problems lies in that.
I am having the same problem w/ my 97 GMC Z71. Did u figure it. out
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