utc_pyro Posted July 18, 2010 Author Share Posted July 18, 2010 (edited) That was Msprank(?) With the 08 valve body. He described that as something they used to match the impedance so the tcu would not throw a code (as if the actually changed the solinoids), but thinking about it I think you are right. It was just a cheap simple way for them to bump up the line pressure. Edited July 18, 2010 by utc_pyro Link to comment Share on other sites More sharing options...
m sprank Posted July 18, 2010 Share Posted July 18, 2010 (edited) Thats me. I have the external resistor. Porcelain style. Like you get at Radio Shack. I can see it zip tied to a harness of wires. I can take a pic and check resistance value. The car is on stands while I strip it since it got rear ended. My VB is for sale too, lol. It is the very first 2008 VB IPT ever did. I drove the car there and left it with them for the day. Edited July 18, 2010 by m sprank Link to comment Share on other sites More sharing options...
utc_pyro Posted July 18, 2010 Author Share Posted July 18, 2010 Thats me. I have the external resistor. Porcelain style. Like you get at Radio Shack. I can see it zip tied to a harness of wires. I can take a pic and check resistance value. The car is on stands while I strip it sine it got rear ended. My VB is for sale too, lol. It is the very first 2008 VB IPT ever did. I drove the car there and left it with them for the day. Yep, that would be a "power resistor", capable of handling higher current. If I'm reading the speck sheet right on the leniar current regulator the TCU uses to regulate the pressure, it can put out a few amps. If you could take a pic AND check the value it would be much appreciated. When checking the value, you'll see the resistor and the solenoid's current in parrellel. If you can see a value marked on the resistor, we can back out the coil impedance. I can compare that to the coil impedance on my car, and give you all a value that will work on an 05/06/07(?) as well. Link to comment Share on other sites More sharing options...
fishbone Posted July 19, 2010 Share Posted July 19, 2010 Mine doesn't have an external one. I wonder if the resistor was a feature of the newer trannies, or the older ones have it located in the VB or is not needed at all. Link to comment Share on other sites More sharing options...
underground000 Posted July 19, 2010 Share Posted July 19, 2010 I think it was external because his was the first 08. There was a ECU and valve body change in 08. If they needed they just changed the resistor right there instead of getting into the valvebody (drain fluids...) 5eat downshift rev match:) Powder coated wheels: completed:) Link to comment Share on other sites More sharing options...
utc_pyro Posted July 19, 2010 Author Share Posted July 19, 2010 They probably put it internally. In doing a VB mod, why would you not do a simple electrical mod to increse the line pressure? It's not there in the OEM setup, it just tricks the tcu into allowing higher pressures. Link to comment Share on other sites More sharing options...
m sprank Posted July 19, 2010 Share Posted July 19, 2010 Yup. Mine is external because it was the first 2008. VB on 2008 is more like 4EAT than previous 5EAT's. Because of this they had to change the resistor severa times before getting it right. External because they kept swapping. Just a bummer that once they got it right they never put it inside the VB. What if I had mailed it in instead of driving in? Makes me wonder. Link to comment Share on other sites More sharing options...
underground000 Posted July 19, 2010 Share Posted July 19, 2010 Then it would of sucked for you:p paying for shipping xx times, but how would they know if a diff resistor made it better? That would of sucked:lol:Â You drove all the way to NJ from CA? I drove from SC to CA and got of tired/bored from driving on day 4 (last day) I dont think I could of done a round trip 5eat downshift rev match:) Powder coated wheels: completed:) Link to comment Share on other sites More sharing options...
hadvw Posted July 19, 2010 Share Posted July 19, 2010 The only advice I can offer is: GIAC USA did a TCU reprogramming for certain Passat 1.8T models, IIRC. Would they be interested in being hired for something like this? I'd pay $200 to be able to adjust my 5EAT with respect to shift speed/points, etc.. I'm sure there's at least another 20-30 people who feel the same way.. Link to comment Share on other sites More sharing options...
m sprank Posted July 19, 2010 Share Posted July 19, 2010 Then it would of sucked for you:p paying for shipping xx times, but how would they know if a diff resistor made it better? That would of sucked:lol: You drove all the way to NJ from CA? I drove from SC to CA and got of tired/bored from driving on day 4 (last day) I dont think I could of done a round trip  I am dedicated, but not that dedicated. At the time I was working in NYC and living about 30 miles from IPT. I knew I might get sent back to Cali, so I went to IPT before I had to leave. Made sure to do all my upgrades before the 4k road trip back to Cali.  But can you imagine the nightmare if I had shipped it in? They told me they tried SEVERAL resistor values before they got it right. Also took a few extra hours more than normal. I could see it having taken several shipping trips back and forth before getting it right. Link to comment Share on other sites More sharing options...
m sprank Posted July 27, 2010 Share Posted July 27, 2010 Sorry it took a bit. I spaced it. Resistor is 10watt 5.1ohm. Car is 2008 LGT 5EAT. Hope this helps. Link to comment Share on other sites More sharing options...
underground000 Posted July 27, 2010 Share Posted July 27, 2010 Sorry it took a bit. I spaced it. Resistor is 10watt 5.1ohm. Car is 2008 LGT 5EAT. Hope this helps. It helps for me cause mine is 08:) But doesnt help utc_pyro because his is older model, diff tcu. Its a starting point Do you still have it? can you take a pic and what wire(s) its connected to? I may try it if I can get away not hacking up the harness Hmm...My idea is to remove the wire(s) from the harness plug into tcu, add wire with resistor to the pin end and reattach new wire w/ new pin to harness plug. Thats if the resistor is inline from tcu to VB. If its at the VB then its another story Thanks m sprank 5eat downshift rev match:) Powder coated wheels: completed:) Link to comment Share on other sites More sharing options...
m sprank Posted July 28, 2010 Share Posted July 28, 2010 I will take a pic tomorrow. I have the tranny mount on my bench. Just pulled the insert. I will take a pic before I put the mount back in. Link to comment Share on other sites More sharing options...
utc_pyro Posted July 28, 2010 Author Share Posted July 28, 2010 What part of the car did they mount the resistor on BTW? You happen to be able to trace the wires to pins on a connector? Also, if you can touch a multimeter to the leads on it and measure the resistance we can tell how it hooks up to the valve body and how to make it work on the older cars. Thanks M Sprank! Link to comment Share on other sites More sharing options...
m sprank Posted July 28, 2010 Share Posted July 28, 2010 Do what I can. Its mounted close to the VB. I will try and trace what wires it intercepts. You want resistance measured with it connected? Or you want me to verify resistance of resistor? Link to comment Share on other sites More sharing options...
utc_pyro Posted July 28, 2010 Author Share Posted July 28, 2010 With it connected. 5.1ohms is really specific, so I doubt it's off much. I want to know what the resistance of the coil plus the resistor together is so I can back out the resistance of the coil mathematically. Link to comment Share on other sites More sharing options...
m sprank Posted July 28, 2010 Share Posted July 28, 2010 you got it. Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted July 28, 2010 Share Posted July 28, 2010 hell I forgot to snap photos of the VB in my garage. I'll get that to you, just not very quickly [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...
subarutech77 Posted July 29, 2010 Share Posted July 29, 2010 Well, if some one has a contact there familiar with the SSM III tool, I have a few questions that could help us... It's a $3000+ piece of equipment, so I dont think they'll be lending it to us. That said, they could tell us if any updates are avalibel for ANY of the TCU's. If we can find one that has an update, I can get the equipment to "sniff" the flashing of one. That will give us the ROM and how to flash it. I can help you with this if your local dealers are unwilling.  There is a 5EAT update for the 05 LGT and OBXT for DTCs, none for 06-07, and there is one for the 08-09 LGT and OBXT for shifting issues. I wouldn't know how to get just those files, but if you have a sniffer program, that might work. However, you would only be able to reflash a TCM with an older Calibration ID, if the TCU that you are trying to flash with the update already has the latest calibration for that TCU, it will not flash it, but you may be able to get the access address.  My wife drives an 05 OBXT, I'll see if hers has the latest update.  I really need the 4EAT TCU hacked, I've installed a VTD center diff in my 05 FXT, it originally came with a MPT center diff, and the rear speed sensor now reads wrong because of different number of teeth on the sensor wheel. If I was able to procure a donor 4EAT TCU and followed the same steps that you've done in this thread, but in a different thread, would you guys be willing to help or at least point me in the right direction. I have no problem doing the footwork and reading and researching, but I have no background in this kind of stuff, and would most likely need help with the software end of things Also did your class have a textbook? does it have an ISBN number? Or, can anyone recommend a book on assembly language, micro-controller programming? That I could try to wrap my head around. Thanks Link to comment Share on other sites More sharing options...
subarutech77 Posted July 29, 2010 Share Posted July 29, 2010 Also, check this thread out. It's 4EAT based, but he put a 10W 6ohm resistor parallel with the line pressure solenoid to boost pressure, I haven't done that yet, but am really thinking about it http://www.subaruforester.org/vbulletin/f89/tc-lockup-mod-06-fxt-38281/ Link to comment Share on other sites More sharing options...
hadvw Posted July 29, 2010 Share Posted July 29, 2010 Hmm. Didn't someone make a "shift-kit" for the 4EAT, where you can pick any gear you want at will with a joystick-like 4-position shifter? Link to comment Share on other sites More sharing options...
Leonardo Posted July 29, 2010 Share Posted July 29, 2010 I can help you with this if your local dealers are unwilling.  There is a 5EAT update for the 05 LGT and OBXT for DTCs, none for 06-07, and there is one for the 08-09 LGT and OBXT for shifting issues. Thanks How new (or old) is the update? As in release date or something? Link to comment Share on other sites More sharing options...
fishbone Posted July 29, 2010 Share Posted July 29, 2010 The update is a few years old as far as I know, and it only pertains to solving a couple TCU codes that the transmission might trigger as a fluke. I don't think it addresses anything else unless there is a second update I am not aware of. Link to comment Share on other sites More sharing options...
Leonardo Posted July 29, 2010 Share Posted July 29, 2010 Hope it's for the 205.5! Link to comment Share on other sites More sharing options...
fishbone Posted July 29, 2010 Share Posted July 29, 2010 Mine is a 2005, and the update was available for me. Link to comment Share on other sites More sharing options...
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