okay so I just got around to checking my fluids, rear diff is a little dark, smells burnt but not bad. I get into my truck after checking the transfer case as well (Yes both are double check tight.) but Now my Rear Anti Lock idiot light is flashing steady. thought I'd ask the experts what is causing the issue.

 

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Nevermind, close the post, light shut off after the next start up. must have been a ghost in the system.