All,
Long time since I've been on here, life is crazy.


I have been looking around for a problem specific to this and have not found any quite like this. There is a possibility that I am dealing with two basically unrelated problems, but I'm not sure.


Lately, The ABS light, TSC, and my parking brake light have been on. The message also says to check brake system. So I have been researching as much as I can about the ABS system and how it's tied into the TCS as well as the advanctrac system. I was going to go to autozone to have them scan my ecm (since my edge tuner is not picking up any codes).


My wife has complained that when turning left, thru the middle of the turn when she is accelerating, the truck made an awful grinding noise complemented with a whining noise and the RPM and Speedo raced upward and she couldn't drive on until they came back down.


I thought she was possibly exaggerating and was just slipping around the turn a little and that the grinding was maybe the ABS kicking in. (It has done that a couple of times as of late).


I was leaning towards a sensor problem as was ready to fork out $40-90 for whichever sensor was bad today. On my way to work this morning, this happened to me. It was exactly as she described it, only this time nothing I did would make it reengage. I would switch it to neutral, reverse, back to drive, thru the gears, park; every time I would go back to a "driving" gear, it would start grinding even at idle. Just for kicks, I reloaded the stock tune on the edge programmer and tried it to no avail. So I pushed it off the road, and while I was waiting for a ride, I tried it again and for whatever reason it worked again. I limped it to my uncle's garage and as I sit here and fume and desperately search for anything related on the internet, I have found nothing.


the truck specs are as follows:


2010 F150 XLT SCREW
4.6, 93k miles, 4x2 3v with cam phaser knock package...lol
Edge Tuner ( I had the level 2 programmed, stock now)
Eaton Detroit Trutrac limited slip rear end, stock gears
Bilstein 5100s front and back
Slotted Front Rotors
A little taller eco plus road tires, can't think of size right now, nothing extreme
Aftermarket backup camera


Any theories or attempted fixes are welcomed!

 

You might be battling two problems. I can't remember if Ford used a sensor in the rear end or on both rear wheels for abs. But seeing as you have changed your rear end before, and its easy enough to access I would start there. If it was still just revving, and not moving have someone put it in gear as you look under it to see if the driveshaft is spinning. I have seen cases where the carrier and ring gear have separated. Either by bolts backing out by improper install, and by bolts shearing off.

 

As far as the sensors, I am unsure as well. While looking for replacement parts, for the back sensor, some sites list only a "rear" sensor, and some list "right rear" and "left rear".
As far as the ring gear separating from the case, I'm not quite sure it can be that catastrophic. When I turned it back on and put it into drive to try one more time, the truck acted as normal for another mile to my uncle's house. I am gonna try to recreate it after I get off work.

 

Yeah at some point it switched over to two sensors it has tone rings on the axle shafts. That would be easy to find crawling around under the truck. I agree with you on it not being that catastrophic. I just find it a little strange the transmission would act up that severally with no prior issues, minus that one episode the wife had. But then again i have seen transmission also grenade but they also never started going again haha. Figured looking at the rear end was an easy quick check to narrow down possibilities.

 

Yea I think that's where ill start. When I did the LS swap, there was no toner ring in the housing. Guess it's safe to say they are on both wheels like you said. I really hope it's not the trans. I have this truck just about how I want it!

 

For what it's worth, when i had an 09 4.6 XL, i fried a shift solenoid which in turn fried the wiring harness to the tcm. It didn't throw any codes, but i couldn't go past 2nd gear. I drove it like that 80+ miles to my dealership. (I was a little pissed lol) they replaced everything under warranty after trying to charge me. Might be something to look at. I'm sure the parts are semi-expensive as most electronics are. Good luck.

 

I'll look into it after I check some mechanical stuff. To date, its still only after you turn left. More I think about it, the more I think it would have to be a mechanical problem. But again, I dunno....

 

You need to hook up and check your abs for codes...

 

I just did. I got the following:

C1299; left rear wheel speed sensor input signal fault
C1963; stability control inhibit warning
U0 100; lost communication with ecm/pcm "A"
U0 101; lost communication with tcm
C1175; left rear wheel speed sensor input circuit failure.

I pulled the left sensor and tested the resistance. It checks out but I think I'm still gonna replace it anyway.

And clues?

 

The 6r80 tranny is pretty robust, my truck was a company cabling truck and has well over 200k miles on original tranny. I also have the 4.6 3v engine.

Look real close at the toner ring, sometimes all they get is a small crack on one segment and they create problems. Salt and sand eats at stuff.