Well oh boy, lemme tell ya...
So my rear (e) locker has been non-op since last year. I found out on a super slippery, hot peanut-buttery trail ride on Beasley Knob. Not fun, especially when coupled with finding out that my old MTs were toast for the "M" part. I thought I'd fixed the locker, but then it was on vacay during COTR in October.
@patchagan came over last week to help diagnose, and together we found that definitively, power was getting from the relay under the hood to the end of the truck-side wiring. We tried a bunch of fiddling and whatnot, no dice. So we decided the next move was to pull the 3rd member and see what was up. That's when Patch left me and I had to do the hard part alone
Over the weekend I did the thing. I've not pulled apart an axle before so it was a fun experience. Nothing eventful in pulling. Put the axle on stands, remove the wheels, drain the diff, remove e-brake cable ends, remove speed sensor, remove and hang calipers, remove and hang rear end of the drive shaft, and remove the 4 17mm nuts holding the entire brake/hub/bearing assembly to the axle. A couple friendly whacks and it's all out. Pull the shafts out 6" and rest (level) on a jack stand. No need to take it all the way out for this.
@Wermz came over to look at it with me for about 20 minutes. We both determined, it's a diff.
4x17mm nuts and ABS sensor pictured here.
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Entire assembled 3rd member is out. You can see the entire axle shaft supported on a jack stand in the background, just a few inches out from its home. IB4 someone says something about resting the axle assembly on the wheel stud. It was fine. Get a life.
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Here we can see the locker itself. It's the big bright silver chunk right in the middle. You can see the ramps and the pins that actually lock the diff. When open, it just spins free. When locked, the pins engage on the ends of the ramps and force everything to spin together. That's my layman's description. If I said something wrong, well the other people who don't know, won't know anyway.
View attachment 3324012
Here's how it works:
OK so what was the problem with mine? Well, egg on my face, it ended up being a faulty connector. And wouldn't you know it, my gator clips that I used for testing were also faulty, so I was getting false info while diagnosing before pulling the 3rd. What an idiot, right? Probably. But it was not an unenjoyable project, and I feel more competent in my understanding of the truck and my capability to wrench (and f*** s*** up).
I added some simple blade style connectors, then heat shrunk and taped the ever loving crap out of them. They're not goin' anywhere. Today I grabbed a new tube of red FIPG from Mr. T and got her all buttoned up. Filled the diff with 3.5-4 qts of Lucas 75-90. Tested everything and it didn't work. Took me a few minutes of fenagling, head scratching, and cursing to think to put the transmission in neutral. Brilliant! Everything works great. I also lifted the front end up, locked the CDL and front diff, and tested everything together. It's a bitch to turn but all 4 wheels move forward together. Great success.
TL,DR: I should have just swapped out the electrical connector on top of the pumpkin.
Next up is to put my sliders and skids back on, throw on the 35s and she's ready to kick ass and take names at JizzMeater in June.