What's new
By:
Filters

2bbs 2021 bronco build

my intuition also says wheel speed sensor or something else in the hub area (if there's anything else on the newer shit). I'd expect an ABS sensor to light up the cluster immediately, not only at high speeds
 
So unless I am blind or totally missing something im not seeing any abs sensors. The only wires going to the front are for what apears to be wheel speed sensors, and only wires to the back apear to be wheel speed and electric E brake.

I cleaned all the sensors (which already looked spotless as well as looked over any plugs that may have been touched in tthe hub area and for the rack
 
One thing to try, are the wheel speed sensors inserted all the way?

When I first converted my van to 4x4, it would work fine to a certain speed, then shifting and speedometer would go haywire. I didn’t have the VSS seated all the way in the trans (or t-case, it’s been a while). So at low speeds it could figure it out with a weak signal, but higher speeds was crap.
 
Jeffh555 said:
One thing to try, are the wheel speed sensors inserted all the way?

When I first converted my van to 4x4, it would work fine to a certain speed, then shifting and speedometer would go haywire. I didn’t have the VSS seated all the way in the trans (or t-case, it’s been a while). So at low speeds it could figure it out with a weak signal, but higher speeds was crap.
Click to expand...
I just pulled and cleaned them.... seemed like they were in all the way before and after.
 
Do you have a way to adjust tire size? Might be a miss alignment of transmission speed to wheel speed?

Really it's more likely something needs reset.
 
You won’t be able to easily diagnose it without pulling the DTCs. ABS light has probably 50 different DTCs that will set the light. I suspect that there will need to be a yaw rate or other calibration that needs to be redone after all the changes that you’ve made to the suspension.
 
Chkn said:
You won’t be able to easily diagnose it without pulling the DTCs. ABS light has probably 50 different DTCs that will set the light. I suspect that there will need to be a yaw rate or other calibration that needs to be redone after all the changes that you’ve made to the suspension.
Click to expand...
Suspension is essentially back to stock, and when I lifted it it dednt need anything
 
2big bronco said:
So unless I am blind or totally missing something im not seeing any abs sensors. The only wires going to the front are for what apears to be wheel speed sensors, and only wires to the back apear to be wheel speed and electric E brake.

I cleaned all the sensors (which already looked spotless as well as looked over any plugs that may have been touched in tthe hub area and for the rack
Click to expand...
Wheel speed sensors are abs sensors. Also used for stability and traction control. Where do they plug in now? But or portal box?
 
DMG said:
Wheel speed sensors are abs sensors. Also used for stability and traction control. Where do they plug in now? But or portal box?
Click to expand...
Portal box up front, axle housing in back. Im wondering if the auto and manuals may have different tone rings.


Anyhow my cousin and his super snapon scanner should be over in an hour or so
 
Only code there is for excessive clutch slippage limiting power.... showed up 2 times.

Now the wheel speed sensors are on the axle shafts essentially before any crazy gearing stuff happens....
 
2big bronco said:
Only code there is for excessive clutch slippage limiting power.... showed up 2 times.

Now the wheel speed sensors are on the axle shafts essentially before any crazy gearing stuff happens....
Click to expand...
I wonder if the longitudinal acceleration sensor is disagreeing with the speedo? Di you have your cousin reset and recalibrate everything?
 
Do you have the specific code? I don’t know the ins and outs of the Bronco but you should be able to verify the clutch by driving with the trans in 1:1 ratio and monitoring engine RPM vs trans input speed. You shouldn’t see any slippage.
 
DMG said:
I wonder if the longitudinal acceleration sensor is disagreeing with the speedo? Di you have your cousin reset and recalibrate everything?
Click to expand...


He went through and looked at all the systems and said everything looked good. Still thinking that it might be something disagreeing with eachother we went out for a drive and live monitored all 4 wheel speed sensors as well as the vss.... and they were all in perfect sinc the whole time. The clutch never felt slippy at all and it even went into problem mode cruising down hill at 2500rpms. After that just to be sure we did several burn outs and tire chirping through 3rd.... with no clutch slipping.

No idea what now...
 
Chkn said:
Do you have the specific code? I don’t know the ins and outs of the Bronco but you should be able to verify the clutch by driving with the trans in 1:1 ratio and monitoring engine RPM vs trans input speed. You shouldn’t see any slippage.
Click to expand...
P179c
 
2big bronco said:
Only code there is for excessive clutch slippage limiting power.... showed up 2 times.

Now the wheel speed sensors are on the axle shafts essentially before any crazy gearing stuff happens....
Click to expand...

The wheel speed sensors are before the portal? So speedo should be way off of GPS now?

I was going to say if the sensor was on the hub and there is another sensor on the trans, it might think the clutch is slipping because of a 22% increase in rpm at the trans vs the wheels.

Is yours the first manual with portals?
 
YotaAtieToo said:
The wheel speed sensors are before the portal? So speedo should be way off of GPS now?

I was going to say if the sensor was on the hub and there is another sensor on the trans, it might think the clutch is slipping because of a 22% increase in rpm at the trans vs the wheels.

Is yours the first manual with portals?
Click to expand...
Believe it is the first manual with portals. Wheels speed sensors are before the reduction so in my opinion the computer shouldnt see the reduction either
 
Might be a bad speed sensor in the transmission? Your best bet would be Googling Ecoboost mustang and p179c.

The other thing that seems to cause these issues is the battery getting low from not running. I would check you voltage off, at idle and 3000rpms. Check some grounds? I had a loose battery terminal last time I got the power reducer code.
 
You may not want to hear this but you'll have to buy an OEM disc or subscribe to the Ford repair site.

This is all just guessing without pulling the code and doing the troubleshooting chart. Sure you visually check stuff but until you know what sets the code and then what values you have it's a guessing game.

This isn't a 90s truck where disconnecting the battery and touching the terminals together erases the computer. This thing is built by a company that wants to jam it in your ass sideways and has the programming to do so.

Gotta play their game and subscribe.
 
  • Like
Reactions: DMG
Skinny said:
You may not want to hear this but you'll have to buy an OEM disc or subscribe to the Ford repair site.

This is all just guessing without pulling the code and doing the troubleshooting chart. Sure you visually check stuff but until you know what sets the code and then what values you have it's a guessing game.

This isn't a 90s truck where disconnecting the battery and touching the terminals together erases the computer. This thing is built by a company that wants to jam it in your ass sideways and has the programming to do so.

Gotta play their game and subscribe.
Click to expand...

Ok, so you obviously know more then me about this, so fords program will give me more info then
"excessive clutch slipping"?

Looks like the disc is $300

Do you have the software? Your not to far from me, what do you want to look into the magic? I can pull it up there and play shop bitch.
 
Last edited:
does the speedo read high or low

if it reads lower than stock, could the computer be expecting 70mph at 3000rpm but reading 62mph at 3000rpm and thinking its clutch slippage?

spitballing, I've got no idea. But you seem to be getting close. There's got to be something angry in speed reading sensors. Can you use the fancy tool to adjust the speedo for tire size / calibrate so its accurate again?
 
2big bronco said:
Ok, so you obviously know more then me about this, so fords program will give me more info then
"excessive clutch slipping"?

Looks like the disc is $300

Do you have the software? Your not to far from me, what do you want to look into the magic? I can pull it up there and play shop bitch
Click to expand...

Probably need to do an AWD Module relearn to clear the module errors(modules store errors and the awd module sucks balls to reset). You need to learn this shit, FDRS and Forscan are required if you need to do any major repairs. Everything with a circuit board comes un-programmed now.
 
budget76 said:
does the speedo read high or low

if it reads lower than stock, could the computer be expecting 70mph at 3000rpm but reading 62mph at 3000rpm and thinking its clutch slippage?

spitballing, I've got no idea. But you seem to be getting close. There's got to be something angry in speed reading sensors. Can you use the fancy tool to adjust the speedo for tire size / calibrate so its accurate again?
Click to expand...
Speedo is reading a little low... I also thought about trying to use forscan to input the tire diameter that should force it all to read correctly for my final drive ratio. Inputting 40inch tires should get everything mathematically correct even though I have 37s.

What I dont understand is that the speed sensors are before the reduction in the hubs and "IF" the tone rings are correct then how or why the computer would know anything is wrong.
 
You must log in or register to reply here.
Top Back Refresh