Cool, I'll try that later. Jumping the two pins on that connector near the shifter worked like a charm though.
I just had someone stand on my brakes as hard as they could while I breaker bar'd that diff nut, no luck still. The brakes actually succumbed to my awesome arm torques.
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I'm actually starting to get ticked off about this driveline issue. I'm gonna go back in there and Try to steer away from this direction we are headed.