Ok, I will try not to be winded but this has been exhausting...so I will give back story: already had the PCM chase which was elusive and tear jerking. I already had the "what's that vibration and why are my brakes acting strange " both annoying but handled. Lastly the heatercore= red head vs red head and this crazy B won after 4 days of me second guessing my ability compared to the guys at the shop lol. Regardless I pulled that off too. Now, we are at 207,000 miles and I've had her since 2011 when I found her in Denver Colorado. Brought her back to illinois 4 yrs ago.
Other than the usual wear and tear she's been more than reliable. I recently replaced the brakes, front, as back were less than 5,xxx miles ago with tire rotation, and that's when havoc came to visit. Brakes including pads and rotors were replaced. Morning after, I had a horrible feel and sound, cursed a lot and found the weights inside drivers when we being ate off. Very odd! Took them off, grabbed my chest and got her home. Found what the issue was after looking over everything... bad wheel bearing. Replaced hub not just the bearings. Had new abs sensor so that was a plus. Next day, abs and brake light. Thought probably better look at rear sensor, never replaced just cleaned 2012. Next day, same lights and now to stop at normal speed, engages abs and wow that's not fun. I've considered the hub could be bad from store and axle could be bad due to bad bearing but I'm not wanting to guess and continue this charade. The kicker is the sound I hear now, sounds like abs motor honestly. I hear it inside the truck when moving. I unplugged sensor in back to see if it changed and it didnt. I've checked for loose arms and shafts and maybe a air flow kink and got nothin. No codes, no misfiring, or anything...next idea?

 

Need to be able to read ABS codes, and see what it's whining about.

The problem showing up after you changed a hub/bearing is highly suspicious......

 

The special tech at OReillys told me the code was for the speed sensor in rear but no number or anything and instead of being a real jerk I replaced it thinking it was a start. I drove to work this morning and I just can't shake the idea that something is causing a drag or something that has a feeling but no growl, is best I can put it. I will go by after work and try again with the scan tool and hopefully someone else. Worst case scenario, I'm a jerk and well, so be it. I will keep you posted. Thank you by the way!! I promise im not over reacting lol. *this time*

 

No codes after taking it to work and back, 15 miles tops. It is a very similar feeling to the 4x4 on. I haven't turned it on and have no lights saying it switched on its own but in 4wd I can can feel more than just front, as in bumps go over with front then rear. I decided to see what I could find if I crawled under and flashlighted to see... so I figure on the casket, plenum, but got more. The olli set is all over and thin but not obsolete by any means. I looked away drive shaft and oil pan... it's easier to say general maintenance had been done in small doses. The basics I have a schedule the time consuming i wait like a bonehead. Think that leak could set this all in motion? I guess I'm gonna clean her up and see lol