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Modify AWD programming?

Discussion in 'Modified 2011- 2019 Explorer Sport Tuning' started by Marc S, January 21, 2018.

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    1. Marc S

      Marc S New Member

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      Is anyone modifying the AWD programming to get more rear bias?

      Anyone experienced the performance in a sport with torque steer compensation turned off?

      The 2013 is great, but the FWD takes some getting used to!
       
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    3. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      Welcome to the Forum Marc.:wave:
      When you state "torque steer compensation" are you referring to Traction Control? No one here has posted about modifying the AWD bias. Not sure it is even possible since it would likely affect all TMS settings. I've read various post about torque steer but can't say I've experienced it.

      Peter
       
    4. Marc S

      Marc S New Member

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      There is a setting on the forscan Excel sheet by platinumOwner for the power steering module that is called Torque Steer Compensation.... Not sure what it is ... (Thanks for all of the info platinumOwner!)

      I've read that the PIU has a different tune for the AWD that has more rear bias. I was hoping there's a way to tune the AWD lol like the motor tunes.
       
    5. Kikinz24

      Kikinz24 Active Member

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      Well if this help you out any here's my as built I have a 2015 PIU 3.5 ecoboost awd. Compare it to yours and let's see what is actually different[​IMG]
       
    6. Marc S

      Marc S New Member

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      I have a 2013 Sport:

      2015 PIU 3.5 ecoboost awd
      PSCM 730-01-01 0 5 0 3 0 0 0 1 0 0 4 2
      PSCM 730-01-02 0 0 0 0 0 0 0 0 0 0 3 A
      PSCM 730-01-03 0 0 0 0 3 B

      2013 Sport
      PSCM 730-01-01 0 7 0 5 0 0 0 1 0 0 4 6
      PSCM 730-01-02 0 1 0 0 0 0 0 0 0 0 3 B
      PSCM 730-01-03 0 0 0 0 3 B

      I'm looking at "PlatinumOwner" 's excel sheet with definitions (FORScan 2011-2018 Explorers)

      The first byte is labeled as "vehicle variant tune selector"
      05=3.7L TiVCT FWD Police,
      07=3.5L GTDi Sport 20" Hankook Tire,
      Seems to be correct for my sport, but incorrect for the PIU AWD Turbo.......

      Second byte is labeled "tire size"
      03=18" Tire,
      05=20" Tire
      Seems to be correct for both, for RIM size anyway...

      First byte in second block (730-01-02) is labeled as "Torque Steer Compensation"
      00=Disabled
      01=Enabled
      Looks like the Sport has it enabled while PIU does not. I'm wondering if that is due to the fact that the Explorer is more FWD for gas mileage, while the PIU has more rear bias and therefore does not need. Something seems to be incorrect in teh spreadsheet though, as the 05 in the first byte is thought to mean a 3.7 FWD, which I would really expect to have torque steer compensation....

      Any Ideas?
       
    7. golf4283

      golf4283 New Member

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      following. I'd be interested in a more even if not rear wheel bias like my subaru used to be.
       
    8. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      I believe 'Sand' mode will do that but I don't think it can be left in that mode for regular driving.

      Peter
       
    9. expoman55

      expoman55 Elite Explorer

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      Just wondering if there are any Ford Engineering types out there who can chime in on this.. Love to put more bias in RWD for my Sport vs shifting. I think Peter could be right in that driving with selector in sand all the time may not be ok for transaxle
       
    10. thefranchise713

      thefranchise713 Active Member

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      Vehicle Variant Tune Selector = PSCM = Power Steering Control Module.

      That's going to change a handling strategy, not a torque bias.
       
    11. MarioMatos

      MarioMatos Member

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      ITCC Control Only Tranfer 100:0 In Normal Condition And 50;50 On Deman :( This Suck

      This Generation In Ford Explorer Is More FWD Layout

      Good Awd System Send 100:0 50;50 0;100
       
    12. Phil DeVtec

      Phil DeVtec New Member

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      I would agree, I think that is the only part of the Explorer I can't get used to. As a matter of fact, it is the main reason I can't enjoy driving this car (I should have test driven this car). I really hope somebody figures this out. It would be amazing if it shifted RWD.
       
    13. Kikinz24

      Kikinz24 Active Member

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      There is no way to do that with this setup. It is a fwd transmission with an added ptu to allow power to the rear wheels thru the passenger axle shaft. Unlike Subarus that are basically a rwd transmission with front ouput shafts . Your normal mode is left side front power and passenger follow. Other modes only send more power to the passenger side at the same time allowing the rear shaft to spin the same amount.
       
    14. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      I'm not quite following your post Phil. What is there to "get used to"? What takes the enjoyment out driving it? I've driven plenty of RWD cars in my lifetime and I have no issues with the handling of the Explorer. I personally feel it is a great driving vehicle. Rumour has it the 2020 will be RWD with AWD availability.

      Peter
       
    15. Marc S

      Marc S New Member

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      Yes, I agree with Phil, that's why this thread was started... This thing definitely drives like a FWD car.
      I thought that I'd read somewhere that the PIUs were programmed differently to get more RWD bias, so I was wondering if anyone knew for sure.
      Like one of the previous replies said, we probably need an (ex) engineer from Ford to confirm any of this.
      I suppose many people are complaining about this if Ford is thinking to go back to RWD.
      I can't wait to drive a 2020 and see!

      -Marc
       
    16. Quicksilver

      Quicksilver Active Member

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      I have driven mine in sand mode for tens of thousands of miles, currently over 100K miles on QuickSilver. However my PTU whines as speed increases, does it have anything to do with sand mode? Not sure. Probably has more to do with not changing my PTU fluid until 60K miles, it was bad, very bad. Black, thick, chunky and horrible smelling. I should have changed it at 40K as reccomended by MANY owners here but was lulled into complacentcy by the 'water cooled PTU' theory that '13 and up models were less prone to PTU fluid degredation. Change the fluid by 50K folks...
       
    17. Marc S

      Marc S New Member

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      Doesn't sand mode keep you out of high gear?

      What is driving on "Quicksilver"?
       
    18. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      When you start off from a stop, the rears get more power for a instant before moving to the front. I have seen that several times on the diagram on the dash.

      Peter
       
    19. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      The name of his Explorer.;)

      Peter
       
    20. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      Sand Mode holds gears longer with a more aggressive throttle. I don't think it was really meant for highway driving. I believe the only mode other than Normal that can be used for highway driving is Snow.

      Peter
       
    21. Marc S

      Marc S New Member

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      I see that SOMETIMES... Especially if I'm starting uphill. Usually though it's all FWD from a start...
       
    22. metroplex

      metroplex Member

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      Can anyone shed some light on the torque steer compensation mode? It is disabled on the SHO, Fusion Sport, and my 2018 XLT 4WD. My XLT did not have soft stop or pull drift compensation turned on either like on the SHO and Fusion Sport, just active return to center.

      When I enabled soft stop and drift pull, I noticed my XLT assist at low speeds or when stopped, is reduced.

      I have not tried turning on torque steer compensation, how does it work and what does it feel like? My Cobalt SS Turbo needs that, over 300 hp and FWD.

      To answer the OP, the PTU works all the time but the RDU coupler has to lock or slip the clutches. More RWD bias on our AWD systems may roast the PTU fluid even faster and or wear out the RDU clutch coupler unit slightly faster.
       
    23. Phil DeVtec

      Phil DeVtec New Member

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      If you're not quite following, then there's really no sense in explaining, as you'll never get it. FWD is a completely different feeling than a RWD, and you should know that since you've owned plenty of RWD cars.

      I like the feeling of the car being "pushed" instead of being "pulled"...about as simple as I can put it.
       
    24. peterk9

      peterk9 Staff Member Moderator Elite Explorer

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      One of the advantages stated when FWD came out was it was better to be pulled though than pushed.though a curve. I also founbd it handled better in Winter driving. I have no issues with the current setup. It feels solidly planted on the road. Once you're driving it shouldn't really matter. I guess the biggest difference might be when starting off. I guess it all comes down to a personal preference and I respect yours. My last RWD vehicle was a 1998 Olds so it's been a while.;)

      Peter
       
    25. metroplex

      metroplex Member

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      I enabled Torque Steer Compensation as well as Active Nibble Control. I couldn't really tell a difference in low amplitude/high frequency bumps because the roads here are really bad or smooth. But I could feel a difference in the torque steer compensation, especially during hard launches or powering out of the apex of a turn. It's only slightly noticeable but the steering is doing something to counteract the torque steer.

      I noticed the Fusion Sports have everything enabled except active nibble and torque steer compensation. My 2014 SHO had active nibble and torque steer comp turned on at the factory, but not active return / soft end stops / drift pull compensation. I think the newer Explorers/D3 vehicles have an updated EPAS system along with the other Fords, so they can do more.

      The Navigator and MKZ were the same as the Fusion Sport (no active nibble or or torque steer comp).
       

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