If by unplugging the TCCM you hope to the vehicle will default to 2WD — it received’t. So long as it’s truly working and driving your axle(s), go away it's and acquire it to the mechanic ASAP.
Might be a TCCM problem, encoder motor dilemma or a problem within your transfer case — all of which has been included listed here.
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Hmmm… doesn’t audio just like a TCCM trouble… sounds additional like an encoder motor problem, or probably a transfer circumstance dilemma.
2) the vacuum switch (Situated within the firewall — see one of my posts earlier mentioned for an image) or vacuum diaphram (Situated underneath the battery) may very well be malfunctioning. The task of such components is to tug with a cable which engages the front, appropriate 4WD hub.
Ryan states: April 2, 2008 at nine:24 pm Thanks for the response to my article earlier, And that i had pep boys do a vacuum examination within the system plus they claimed each and every factor was gave the impression to be Alright, so i bought that four wheel travel swith from napa and set up it,(it went into the front axle appropriate where the cable with the actuator attaches), nonetheless no luck. so i could see some kind of sensor along with the transfer case with three vacuum strains hooked up to it, so i changed i, and Again nonetheless very little, so I've a few more thoughts…their is yet another sensor to the tail pice of your transfer circumstance, i was advised it is the velocity control sensor, could that be the issue?
Nonetheless it demonstrates in “four wheel very low†I come to feel my next move is getting rid of the front push shaft , and pulling the servo change motor on the transmission , it seems to be as When the are around 9 wires gonna that servo motor, I’m I on the best tranck ?
Your comment about stepping into slippery ailments plus the 2Hi gentle goes out… The one thing I'm able to think about may be the TCCM (Transfer Circumstance Control Module) can have corroded wires, which was the original subject matter of the thread. Does this occur automatically after you enter into slippery situations?
Hey Shawn, If you sign up for an account listed here, you ought to be capable of add visuals listed here (I haven’t had anyone try it still, but I established it up immediately after One more visitor said she couldn't upload illustrations or photos).
Apart from that, you’d know if you have been in 4WD or not. Such as you stated, park from the mud — set it in 2Hi and Check Out HERE take a look at to get out. Then place it in 4Hi and do exactly the same. There need to be pretty the differenc in sensation among the two modes in mud. If there is not, a pay a visit to to your neighborhood mechanic is so as.
Awesome, Jim! I’m glad the posts listed here were being in a position to aid. Many thanks with the vacuum diagram! Which will be really handy for others attempting to diagnose vacuum troubles.
Full cost — 20 cents (a little dielectric gel and a couple of 50 % hour labour). I’d like to see an invoice for just a similar deal with through the Chevrolet dealer!
The problem is Once i make an effort to go up my hill over a snow protected highway the one tires that have interaction will be the rear. I'm able to hear the hardware adjust underneath the truck among 2H, 4H & 4L – although the front axel(s?
Hmmm… how ’bout hot glue? I really plugged in the most crucial connector to the module (right after sealing all of it up with dielectric gel… which would have prevented this in the first place) after which inserted the wire into pin #one and manufactured the link, and a similar for pin #six.