frank_ster Posted November 28, 2012 Share Posted November 28, 2012 I'm going the option of the mega shift with my megasquirt3 system. i have done some figuring and found the wires and functions for all the solonoids going into the tranny.5 EAT WIRE INDIFICATION.pdf Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
frank_ster Posted November 28, 2012 Author Share Posted November 28, 2012 this is the logic of whitch the solonoids are controld Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
frank_ster Posted November 28, 2012 Author Share Posted November 28, 2012 so cut the 11 wires that we need. solder in a db 25 or 37 connector ( printer or computer screen plugs about 2$ each ) and these wires will go to the megashift or what ever control module. to make the check engine light go off the only thing that i can think of is to do like some one changing to a 5mt or 6 mt car switch ecm and dash to manual version. other than that the steering wheel pushbuttons will go to the controler and the few position switches of the shifter will also go the controler. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted December 5, 2012 Mega Users Share Posted December 5, 2012 Thanks for doing this! It will be a great read!! Link to comment Share on other sites More sharing options...
frank_ster Posted February 26, 2014 Author Share Posted February 26, 2014 gonna cut my first wire in about 45 seconds ! Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
subiestang Posted February 27, 2014 Share Posted February 27, 2014 So how goes it? Link to comment Share on other sites More sharing options...
frank_ster Posted February 27, 2014 Author Share Posted February 27, 2014 So cut the green white wire on pin 23 of the grey connector it's for the transfer clutches. As expected the diff is then fully open. With that wire cut the sport mode started flashing. I have p0700 disabled in the rom so the tranny cannot make the check engin light come on. I figured in advance the tcu will want to see some resistance at least in that cuirit. I spliced in a wire so I can have a remote switch. Surprisingly when I connected the wires again and measured the voltage it's a 2-5 volt system I thought it would go to 12v I get around 2-2.2v at idle and cruise And up to 4.8 v at wot while holding the brakes And there is no difference when in manual mode or auto for the voltage. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
frank_ster Posted February 27, 2014 Author Share Posted February 27, 2014 I jacked up the rear wheels Keep in mind I have the center diff removed so the car is now rwd with the power from the transfer clutches the only way to send power to the front wheels. With the are connected the car pulls ahead easily via the front wheels. Wire disconnected the rears spin freely with no power what so ever to the front . Connect the wire when rear tires are spinning and instant lurch ahead. So the clutches apply real quick! Tomorow I will give the wire switched 5 volts and see what the performance is. So it will be Wire disconnected and signal from tcu connected to ground via resistor I don't know the minimum size to prevent the tcu from setting a code. Off fully open rwd Auto front power engaged from tcu logic On direct 5 v to the solonoid providing maximum power to front wheels at all times Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted February 27, 2014 Share Posted February 27, 2014 Nice! [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
frank_ster Posted February 27, 2014 Author Share Posted February 27, 2014 so we need a 2-4 ohm resistor. it see up to 1 amp at 5 volts so that = 5 watts so would need at least a resister at least 5 watts in heat dissipating ability. i'm actually using a 300 foot spool of wire we had in stock for this test. its about 1.7 ohms. this is whats needed to fool the tcu into thinking its connected to the awd solonoid. i will drive the car home with the spool of wire connected. to see how it behaves. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted February 27, 2014 Share Posted February 27, 2014 I don't remember, does the valve body have a pressure sensor for the transfer clutch, just as it does for all the other clutches? If not, that really simplifies your life. [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
frank_ster Posted February 28, 2014 Author Share Posted February 28, 2014 i think it does.. but how would it simplify my life ? anyways drove home cel never came on. had a hard time driving out of my driveway this morning rwd only. at intersections i had a hard time getting moving ! i remember these days of having rwd or fwd cars ! Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted February 28, 2014 Share Posted February 28, 2014 i think it does.. but how would it simplify my life ? You answered it in your test drive, simplifies your life because you don't have to fool the TCU's transfer clutch pressure sensor (if there is one) with the stock PWM solenoid's output as a mirror for the resistance of that sensor. One of my worries for overriding the other solenoids without also addressing the pressure sensors reading different than TCU requested. But that's a more complicated matter for a different time. Glad you have it working! Fun 4WD on demand. [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
frank_ster Posted February 28, 2014 Author Share Posted February 28, 2014 ^ ah yes .. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
KoukiS14 Posted March 4, 2014 Share Posted March 4, 2014 There is a transfer clutch pressure sensor. I was monitoring it just the other day with ROMRaider. I only casually noted it, but had it displayed while monitoring other parameters. Conditions were nothing dramatic, and I only recall seeing a max of about 75 psi. Adjustable center differential and torque converter control, with output to the stock sensors from the MSGPIO to fool the stock ECU would be ideal. Tune-able tables or logic for each would be ideal. In theory you could build a full plug and play piggyback for the 5EAT TCU that could use all of the inputs and trick all of the outputs so the stock TCU never knew any better, with full transmission control via the MSGPIO in the middle. Link to comment Share on other sites More sharing options...
frank_ster Posted March 4, 2014 Author Share Posted March 4, 2014 the transfer clutch pressures are i think requested pressures... because i was playing with it and the pressures went up and down with the engine off! but i played with it some more yesturday and i can drive around with it open or locked and the sport light doesn't flash as for a complete swap to megashift i would load a manual trans rom to the ecu as throttlehappy recomended and then do what ever you want. i wonder if i could get the connectors from the tcu from digikey or similar.. and just replace the tcu with megashift plug it in and change the rom and call it a day. the only things that may not work is the lever position in the cluster .. but megasquirt is now able to talk to stock can dashboards on bmw's and others Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
programador23 Posted August 12, 2014 Share Posted August 12, 2014 Any advance on this? Link to comment Share on other sites More sharing options...
frank_ster Posted August 12, 2014 Author Share Posted August 12, 2014 on? Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
programador23 Posted August 12, 2014 Share Posted August 12, 2014 Sorry mi English is not good enough, but as I understand you was making a control to change the car from Awd to Fwd or Rwd, if this is correct I am glad to know if you succeed and if it will be a terminated products or a diy. Link to comment Share on other sites More sharing options...
quick4dr Posted August 12, 2014 Share Posted August 12, 2014 This is the car stuff that amazes me! Amazing work!! Link to comment Share on other sites More sharing options...
firehawk618 Posted August 27, 2014 Share Posted August 27, 2014 Wow neat project you have taken on. I WISH SOMEONE REALLY SMART WOULD PUT THE TIME INTO REVERSE ENGINEERING THE STOCK TCU SO WE CAN CHANGE PARAMETERS!!! Ok since I shouted that whole statement some genius should soon have a solution for us. 10' CTS-V, A6, Airraid, 2.4 upper, ID850's, self tuned. SOLD:06' LGT Wagon. BNR16G, Catless UP, DOWN, Hexmods VB, Hexmods diff bushings, BIG TMIC. Best 0-60: 4.651 by AP 1/4= 13.678@100.73 mph, 1.945 60', Automatic transmission. Link to comment Share on other sites More sharing options...
west_minist Posted June 13, 2015 Share Posted June 13, 2015 Hey guys, I don't know if this will help, since you have such a car there that one can test such a product. I am starting to work on a built 5EAT 500+whp mustang power legacy and after noting that a lot of CAN research is needed to be done for EMS replacement for the ECU, the TCU could not be replace due to the many outputs and input needed. I was recommended the following TCU without support from them. I am not sure if you all came across it, but please see here. It could be helpful for those who is doing such a project. On the other hand I don't have a CAN car to perform CAN analysis for the TCU operation. Any one having this data that can be worked with a CAN enable EMS? https://www.powertraincontrolsolutions.com/Performance_Aftermarket/Products/Transmission_Products/TCM-2000_Transmission_Controller/ Link to comment Share on other sites More sharing options...
frank_ster Posted June 14, 2015 Author Share Posted June 14, 2015 Im not sure what you are saying ? Megasqurt and megashift work with can and yes megasquirt can actually talk directly to a can dashboard on the legacy. What my plan is to make the car think its a manual transmission. And then have a stand alone / tied to megasquirt via can . So no can sniffing and decoding required. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
west_minist Posted June 14, 2015 Share Posted June 14, 2015 Just saying there are possible alternatives for those who are looking to do what you are doing. Link to comment Share on other sites More sharing options...
whitrzac Posted June 14, 2015 Share Posted June 14, 2015 Would it be easier to replace the ECU with megasquirt as well? I run megasquirt in my miata, It's much easier to tune and understand that the subaru ecu... Link to comment Share on other sites More sharing options...
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