Your difficulty sounds just like ten Other folks earlier mentioned you — in case you haven’t identified The solution in what I've posted Up to now I, regretably, won't be in a position to assist you to and counsel using your car or truck to some mechanic.
What it looks like is you'll have an encoder motor problem — this is the motor about the side from the Transfer Scenario that controls the shifting of the varied “modes” (2Hi, 4Hi & 4Lo).
When you consider the schematics, you'll be able to see the motor is just “managed” from the TCCM by means of signal wires. I suppose it’s doable that if one of several motor wires ended up for being shorted it may bring about damage to the TCCM — do I think This can be the circumstance?
Raymond Dunne states: January seven, 2008 at ten:27 am Properly right after alot of your time on my 2001 Jimmy 4wd program I am however stumped. Commenced having a clicking noise from front finish so I checked vacuum actuator and it’s performing it occupation since I loosened up the cable. Truck will never go into 2hi or 4lo so I pulled the Manage module and checked wiring. Huge orange wire on electrical power connector was coated in corrosion and 1 wire on 32 pin connector was corroded.
The vacuum for your 4WD process begins over the motorists aspect, goes towards the vacuum actuator in the middle of the firewall (but below the distributor and challenging to see — This really is what I believe you hear — there is a picture up about 10 posts or so) and afterwards goes towards the diaphram underneath the battery.
) The 4lo mild justs blinks continuously by no means goes in just goes back to 4hi. I right here the clicking with the TCCM And that i also listen to the encoding motor Doing work also.
I hope this thread remains alive. In any case, I've concern receiving outside of 4HI. I've read all of this dialogue and Tried many things. I changed the vacuum turn on the transfer circumstance(mine was stuck). Then I checked all vacuum strains(some had been cracked and I changed). Pulled the encoder motor and cleaned it/took aside and re greased/sealed.
Your dilemma regarding the speed Handle sensor — this could bring about a difficulty, but I suppose it Go To THIS Web-Site will depend on if it’s a transmission velocity Manage sensor, or maybe a car speed Command sensor.
I've Chevy 2001 Blazer. The condition I had is that I'm able to’t activate the 4Hi. So I went to dealership. The repair costed me $900 to interchange the TCCM.
At the last place I attempted, I did discover a female connector that will do the trick… it just didn’t contain the tab to hold it in the main connector (Every specific wire clips right into a place in the primary connector).
PS – the “encoder motor” may be the aspect that “retains” your TC in the different modes (properly, that’s not one hundred% precise either — the encoder motor shifts from just one manner to one other — sections In the TC in fact “hold” you in that method — in my situation, it had been a set of “forks” with plastic bushings that wore out — which does not sound like your problem).
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Doesn’t seem excellent. It appears like what I just went via — and it turned out for being the gears/forks in the transfer circumstance. I very first recognized which i experienced difficulty popping out of 4WD, then I started out noticing 4Hi “slipping” out and in.
 In truth, For a lot of cars and trucks, the caster is just not adjustable in any way without having replacing your suspension. If a toe correction isn't going to solve your difficulties, it can be done caster needs to be modified. A mechanic should be able to show you if this is important as well as doable.