Traction Concepts LSD Conversion Kit

[Ecoboost_xsport]

The Guide to Understanding the History of the Ecoboost Power Transfer Unit [Study]

Lot’s of talk recently about the Ford Power Transfer Unit (PTU). It is definitely a frequently referenced component and has been known to be prone to many failures. Below is very interesting video I was turned onto by a member of the SHO forum a few weeks ago. It’s not Ford-specific but does a...

www.fortheworkshop.com

This post covers other stuff too, but the video at the beginning (long and dry), gives an excellent description of the fundamentals of a crossover AWD system like what is found in our platform.

 

[Ecoboost_xsport]

Any omissions or suggestions that need to be addressed in this? I already see you a few things that need to be added.
One these items is my math on the PTU gear ratio is not working out so far.
I think the better explanation of how the rear coupler is needed as well.

The rear coupler has an electromagnet that engages a plate that sits between a ball ramp and the clutch pack....I have photos of the inside of it somewhere...I will find them and update this response.

 

[Ecoboost_xsport]

Interestingly, I have an update on Raybestos as I've been chatting with them recently about this. I'm gonna make it a separate post...

...y'all not gonna be too happy, btw...

 

[Ta2dResqr]

Under normal conditions, only about 30% is transferred to the rear on launch. The bar graph (which sucks with only 4 bars of resoltuon) indicates this.

The Ford Explorer has a terrain management system that allows 50/50 on launch in Sand Mode, but the shift tables suck. Designed for low speed, high torque....like you'd need in sand, lol.

I've tried starting in Sand Mode, then switching mid track, but the car doesn't like that and simply won't shift. The ability to change the front to rear lockup doesn't reside in the PCM, which is why no tuner has been able to access it to change it.

The best that Brad (AJPTurbo) was able to do for me is transfer over the shift tables from Normal Mode (that I race in) to Sand Mode...which seems to have worked, but I haven't had a chance to test it at the track yet.

If you observe the percentage of front/rear lockup within Forscan, you can see an actual percentage. I've been unable to identify what PID this is as I've been dying to be able to datalog this within SCT.

If anyone knows how to extract a PID from a Forscan value, I'm all ears.

AWD module PWM Modulation of rear clutch %

Returns a number that indicates how much the rear clutch is being directed to lock up and thus send power rearward.

PID 22D128

Formula A/256*100

 

[Ecoboost_xsport]

AWD module PWM Modulation of rear clutch %

Returns a number that indicates how much the rear clutch is being directed to lock up and thus send power rearward.

PID 22D128

Formula A/256*100

Hmmm, very cool. Howd you get this? I'm aware of the name of the value, just not a current PID.

There was a PID floating around years ago that I could never get to work. I just want to make sure this isn't the same one. Have you gotten this to work?

 

[Ta2dResqr]

Hmmm, very cool. Howd you get this? I'm aware of the name of the value, just not a current PID.

There was a PID floating around years ago that I could never get to work. I just want to make sure this isn't the same one. Have you gotten this to work?

Ecoboost Owner Forum. It was on a 2011 and confirmed to work.

Also, for the AWD Gauge, I am pretty sure mine is more of a fluid line not a 4 bar graph. I will try to get video of it.

https://www.ecoboostownerforums.com/topic/2175-torque-pids-for-taurus/

 

[Ta2dResqr]

I also think I can access that module with my OBDLink MX+.

 

[Ecoboost_xsport]

Ecoboost Owner Forum. It was on a 2011 and confirmed to work.

Also, for the AWD Gauge, I am pretty sure mine is more of a fluid line not a 4 bar graph. I will try to get video of it.

https://www.ecoboostownerforums.com/topic/2175-torque-pids-for-taurus/

Yeah, that's the same one that doesn't work. I saw that post a few years back and it wouldn't work for me.

I'm looking to see if somehow we can extract a PID from a Forscan value...which is the one you named. I can see percentage as a numerical value in Forscan, but it doesn't show up as an available PID when you do a scan of all PIDs in SCT.

 

[Ecoboost_xsport]

I also think I can access that module with my OBDLink MX+.

I have that Obdlink and haven't been successful

 

[Ta2dResqr]

For OBDLink make sure you have the "Enhanced OEM Add-Ons" downloaded from under the settings menu. Then go to "Diagnostics". Make sure you "Select All" for the networks/modules. Go to "PID Values". Choose "Select PIDS", "Ford, Lincoln, Mercury", "Powertrain Control Module". Should have "All Wheel Drive Clutch Control Commanded %", "All Wheel Drive Clutch Diagnostic Signal %".

For ForScan Lite, they have both available to view also.

I will have to try and mess with it with my OBDLink EX and use their software and ForScan to see if I can get anything more than a graph.

 

[Ecoboost_xsport]

I think you're misunderstanding me, i don't have an issue seeing the output. I am trying to extract the actual PID value...(22****), i can see the percentage just fine, what I'm looking for is that 6 digit PID so that I can begin to develop equations based on it.

The one you referenced from that old ecoboost performance form post is not accurate. I've been through that post many times in the past. I believe that PID works on 2010-2012 but I have been unsuccessful seeing it when I use it in equations. I think it was changed inn 2013 as the value was moved from the PCM to another module, the BCM or possibly the TCM

For ForScan Lite, they have both available to view also.

I will have to try and mess with it with my OBDLink EX and use their software and ForScan to see if I can get anything more than a graph.

 

[802SHO]

Damn, Andrew! Gettin all the credit!!!! Haha.

Not to toot my own horn, but I'm gonna toot my own horn...

The Raybestos thing was me...

I took it as to stick me on their ass (bc of the Traction Concepts response that I got) not bc it was anything I started.

 

[FiveLeeter918]

Under normal conditions, only about 30% is transferred to the rear on launch. The bar graph (which sucks with only 4 bars of resoltuon) indicates this.

The Ford Explorer has a terrain management system that allows 50/50 on launch in Sand Mode, but the shift tables suck. Designed for low speed, high torque....like you'd need in sand, lol.

I've tried starting in Sand Mode, then switching mid track, but the car doesn't like that and simply won't shift. The ability to change the front to rear lockup doesn't reside in the PCM, which is why no tuner has been able to access it to change it.

The best that Brad (AJPTurbo) was able to do for me is transfer over the shift tables from Normal Mode (that I race in) to Sand Mode...which seems to have worked, but I haven't had a chance to test it at the track yet.

If you observe the percentage of front/rear lockup within Forscan, you can see an actual percentage. I've been unable to identify what PID this is as I've been dying to be able to datalog this within SCT.

If anyone knows how to extract a PID from a Forscan value, I'm all ears.

how are you viewing it in Forscan? I'm about to go on lunchbreak and can play with it a little bit to compare HPTuners to Forscan readings.

 

[FiveLeeter918]

Yeah, that's the same one that doesn't work. I saw that post a few years back and it wouldn't work for me.

I'm looking to see if somehow we can extract a PID from a Forscan value...which is the one you named. I can see percentage as a numerical value in Forscan, but it doesn't show up as an available PID when you do a scan of all PIDs in SCT.

I want to say I played around with this a while back and got it to work on Torque PRO. Unfortunately none of that transferred over to my new phone, so I need to dig my old phone out and see if I can find it.

 

[Bluezone]

Which teeth count do you need? Front or rear diff? I have that info.

The tooth count of each of the gears in the PTU. The drive gear splined to the differential, the Idler gear, the driven gear, the ring gear in the PTU and the pinion gear on the PTU output shaft. In that order. Thanks.

 

[Bluezone]

I've already written and posted this

But not quite like this in intent. Yours was an excellent write up by the way.

 

[Ecoboost_xsport]

I want to say I played around with this a while back and got it to work on Torque PRO. Unfortunately none of that transferred over to my new phone, so I need to dig my old phone out and see if I can find it.

I have torque pro myself and have never been able to create a gauge based off this. I need the 6 digit PID...or at least an accurate one.

When you scan for available PIDs in SCT, it doesn't come up (though another 700 or more do, lol)

As for Forscan, its been awhile but IIRC, when you are building a guage screen, the AWD% comes up as an available value to view the output of.

And HPTuners, I've seen a screenshot of someone who was able to view it, but it was only once and I've never been able to get anyone to elaborate on it. Also, it didn't seem to be tunable..simply viewable.

AFAIK, no tuner has been able to tune this feature or make adjustments to it. I keep hearing about it being done, but never definitively. Its an urban legend at this point.

I would switch to HPTUNER if this was accessible for tuning via their loader, but no senescence in switching if there's no real or additional capability gained.

I've asked Brad about it and he is unable to access that parameter for tuning.

 

[Ecoboost_xsport]

The tooth count of each of the gears in the PTU. The drive gear splined to the differential, the Idler gear, the driven gear, the ring gear in the PTU and the pinion gear on the PTU output shaft. In that order. Thanks.

Have you seen my write up on PTU improvements? I've got many many detailed photos of the PTU internals.

An In-Depth Analysis of Potential PTU Improvements [Step-By-Step Guide]

Introduction This is my attempt at doing what little we can to improve the PTU with what is currently available. I’d also like to make it a resource for those of you looking for detailed photos of the latest version of the PTU that has the cooler. I’ve completely torn down the PTU, and sourced […]

www.fortheworkshop.com

 

[Ecoboost_xsport]

But not quite like this in intent. Yours was an excellent write up by the way.

The video does a decent job of explaining it so I didn't put it in text form.

But yeah something worth adding is that the entire AWD subassembly is actually supplied to Ford from a company called JTEKT...

 

[Bluezone]

Have you seen my write up on PTU improvements? I've got many many detailed photos of the PTU internals.

An In-Depth Analysis of Potential PTU Improvements [Step-By-Step Guide]

Introduction This is my attempt at doing what little we can to improve the PTU with what is currently available. I’d also like to make it a resource for those of you looking for detailed photos of the latest version of the PTU that has the cooler. I’ve completely torn down the PTU, and sourced […]

www.fortheworkshop.com

Yes I've seen it. I just reviewed it again. Incredibly good write-up. Now after looking at the pictures you provided. I'm only missing the ring gear tooth count. So far everything is matching up with the numbers I got. That's the problem the math result doesn't seems to be quite right. I will play with the potential numbers of the ring gear in till I get confirmation on their actual count. Do you mind if I provide a link to your write-up for those curious about the intricacies of the PTU? I think it would make a nice addition to what I've written. It's a case of describing how the drivetrain works as a system. I think adding information about the rear differential and viscous clutch would be a good addition as well. Need to explain how the pulse-width modulation on the clutch works.
I'm also curious as to what that 30% torque split means. I'm kind of suspecting that it is a 30% duty cycle, but I could be wrong.