This morning everything was fine, and I got to work without a problem. Later, I left early to attend a Thanksgiving event at my kid’s school, and that’s when this started. Right after pulling out of my parking spot, I hit the brakes at a stop sign and heard a clunky/grinding noise for a second. The brakes felt weak for a moment. After that, the truck started doing what’s shown in the video. It accelerates normally up to about 10-12 mph, but then it seems to want to stop itself. It even shut the AWD off a couple of times. I barely made it to an auto parts store, where I left it for now.
Have you checked what error codes it’s throwing?
Shawn said:
Have you checked what error codes it’s throwing?
@Jalen
The only recent change was the speed sensor, which I’ve been meaning to fix. I kept putting it off, and now here I am dealing with this mess lol.
Jalen said:
@Jalen
The only recent change was the speed sensor, which I’ve been meaning to fix. I kept putting it off, and now here I am dealing with this mess lol.
In my experience, it’s rarely just the sensor. The right rear axle or bearing probably needs to be replaced.
Jalen said:
@Jalen
The only recent change was the speed sensor, which I’ve been meaning to fix. I kept putting it off, and now here I am dealing with this mess lol.
You’ve also been running really low on gas! It’s not good for the fuel pump since the gasoline helps cool it. Running the tank too low often can lead to early fuel pump issues.
@Jalen
Hook it up to live data. Check the readings for all four wheel speed sensors while driving and record a graph of what happens when the issue starts.
Sounds like a bad rack and pinion to me.
Flynn said:
Sounds like a bad rack and pinion to me.
That was replaced about a year ago. It was a rebuilt part (the only option I had), but it came with a lifetime warranty.
Try turning off the traction control and see if that changes anything. You’ll need to disable it every time you restart the truck.
Kelly said:
Try turning off the traction control and see if that changes anything. You’ll need to disable it every time you restart the truck.
I didn’t even think of that! I might’ve been able to drive it home if I had.
@Jalen
The axle spins no matter what since it’s connected to the hub where the tire is mounted. Most likely, the axle or bearing is failing, and the ABS/traction system is getting incorrect sensor readings and trying to compensate. ABS doesn’t engage until a certain speed, but if three wheels are at 15 mph and one reads as stopped, it will react as though something’s wrong.
Focus on fixing the right rear wheel first, then check the PATS issue.