4WD -4X4 - Encoder / Shift motor testing and R&R GMC / Chevy trucks and SUVs.

The 4WD or Four-Wheel-Drive system in most trucks and SUVs sends some of the engine torque to the front wheels when needed. depending on the terrain and rodes conditions like snowy rainy/muddy the system can be full-time or part-time 4WD, the old 4WD systems useda manual locking wheel hubs and a floor shifter lever like the ones on manual transmission trucks or SUVs and the driver has to lock the front wheel hubs at each wheel by turning a dial to the lock or unlock position, in the new 4WD system it uses a control module/range selection switches / front axles locking actuator and an Encoder/shift motor, the driver has four ranges to choose from the 2high range normal roads conditions and only rear-wheel drive, the 4high range this is used on wet slippery roads/terrains only and engine torque is sent to the front wheels and the front axles actuator is locked if the 4high range was driven on dry roads it will damage the transfer case, the 4Llow range is only used in muddy snowy terrain or to get the truck unstuck in this range the transmission will not upshift to higher gears the truck should not be driven in this range on dry roads.

[WPFB]

Thank you.. Best explanation of function and wiring I've come across for the transfer case actuator. Excellent job.

[raszamataz]

Best video on YouTube about figuring out what wrong with 4x4 so instructional

[customs]

Very descriptive video. You did a great job explaining everything. Thank you for the content.

[tonyt]

Thanks, i did exactly what you taught me in this video. 2006 sierra 1500 4x4 is working properly now. Need to test drive it more. Thanks again

[charlied]

Thanks for the video. You provide very detailed and valuable information that is easy to understand. 👍

[yeltsinrodriguez]

Thanks my man. The tool you made that was a great idea i going to use a transfer from the junk yard

[EBHS]

Didn't have to pull drive shaft on my 2005 Tahoe. Bolt fit perfectly between u joint.

[rdelphia]

Thank you this was very informative and just what I needed. Now I’m going to fix mine.

[ga]

Great video on how to not be a parts changer and actually finding the issue.

[doncookbc]

i had a black wire broke and some else had a broken red check wiring first before buying new one

[mrkeopele]

great detail, just what I've been searching for, thank you very much!!

[TheWilliam]

Where does the brown or tan wire original . Can’t get it to read at all.

[markks]

Great video, parts list for amazon would have been a plus!

[Crashcrap]

Is it possible to trick the wiring to switch the motor if not getting a signal from the buttons? Also if that doesn’t work, can you just pull the motor off and manually switch the gears in transfer case?

[tylercarter]

Why not pliers instead of taking encoder motor apart to get that gear out? Easy enough to grab the shaft with pliers and pop into nuetral.

[brandonmason]

My truck when I start it is in 4low. I can switch it to 2h and drive it no issue but if I shut it off and go into a store when I come back out to start it again the truck I back in 4l. How am I supposed to troubleshoot this without wasting hundreds of dollars? Could it still be the actuator even though it moves?

[ermannodangelo]

I have a 263XHD transfer case with encoder motor off, can I plug it in if not bolted to transfer case and push the buttons to see what position the encoder motor is in. Someone removed it and not sure what position it was in when removed. Truck is in 2Hi now.

[daveplumb]

Back probing is very bad venture let’s water in. I don’t understand why you would not use like a Peco breakout lead same connector. You just push it in and has a bear wire at the end where you can clip your lead for your metre on two. It’s a simple thing if you look up Pefco breakouts le ad kit.

[scottprofitt]

So you said the brown wire is ground all the time?

[cognac]

Mine is stuck in 4L and the buttons flash sometikes ans somtikes dokt come on it stsrted this today. And inwas in 4h driving around and everything worked. And it sll stopped and it wont button shift anymore . I only here the tccm clicking.