Do you have the transmission that came with the 5.3 in the van or the one from the 4.3? The output tail bolt pattern is different.

The wiring might work the same but the vss and rear prop shaft sensor positions are reversed between the 4.3 and v8 application auto track 2. 136/236 layout: IMG_2932.png 246 layout: IMG_2931.gif Just use the Astro wiring harness w the 236, follow the PDF earlier in this thread, and if you’re using ...

The VSS and rear prop shaft sensors are reversed from 236 to 246. You also can’t bolt the 246 on the Astro van is what I’ve heard but I never actually tried it. There’s really no reason to use the entire 246 wiring harness, you just need to add wires for the encoder motor and switch. You can chop pi...

I figured out the image thing I am just dumb. Phpbb is just old school lol I am used to the new fangled bulletin board image upload dialog Here’s the wiring diagram for the Tahoe switch IMG_2888.jpeg The front prop spins freely at the same speed roughly as rear in 2wd mode with no driveshaft I am gu...

I got a junkyard TCCM today and put it in and tech2 showed rear prop shaft rpms right away and I drove all the way home with AWD enabled (no drive shaft in right now) w no svc awd light, so good to go I think I wired in the 03-06 Tahoe switch (the one with the long connectors, not the blue) last nig...

Update I found my issue. It was not wiring or a bad sensor, I believe it is faulty junkyard TCCM. The TCCM can not read speed from rear prop shaft sensor pins even when I swapped the working front speed shaft pins over. I am going to try the updated 12577412 TCCM which apparently has software and ha...

Update: I got a VXDiag VCX Nano to use with PCMHammer to flash my 0411 PCM for eFan mod and decided to try out the Tech2 function... tccm.png Replacing the sensor didn't work. Just verified I am not getting rear propshaft speed at the TCCM so time to ohm out the wire. This is actually great because ...

Not that anyone asked, but I put a new speed sensor into the rear propshaft and it's still giving me grief. Also tried swapping the front out in case it was just a speed mismatch issue. No dice Going to get the meter out and check the wiring as well as make sure I pinned everything correctly back in...

I finally got around to pulling the codes out of the TCCM. Using an obdlink LX and torque pro in raw terminal mode >19 d2 ff 00. 6CF11A594300114B C0300 "Rear Prop Shaft Circuit Malfunction" 6CF11A594374114D C0374 heat or general fault 6CF11A59A72511C9 B2725 switch fault 6CF11A59000093BB - ...

Update: I never swapped in the s10 axle tube w disconnect. After about 3 years the transfer case is binding in turns in 2hi. Never did get the AWD to work reliably. Maybe I did something wrong or got bad junkyard parts. I also didn’t really use the 4wd terribly often so I’d say most of the wear that...

I think theres a speed sensor or wire wire or something that isn't acting right for some reason. It does it after you wheel for a while and then is fine again once you restart. So--My random guess is the TCCM is not getting what it expects in some scenario and then erroring out. I think I would need...

I think sway-a-way went out of business already.

Edit: their website is just down

My service awd light comes on if I use the AWD and sometimes in 4hi after wheeling for a while in rough terrain. At that point it is stuck in whatever mode the xfer case is in. Anyone else seen this? The 4wd is definitely working.

The NP236 switch has a red LED for neutral, but I haven't been able to figure out a way to put the transfer case in neutral. What is this light for? Does anyone know?

If you don’t handle a lever like a gorilla, it shouldn’t break That is not what I was getting at--I am saying replacing a 20 year old encoder motor once should it break is less work and less expensive than the kit to add linkage from Journeys off road. I would say this is quite off topic for this t...