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  • Bill
    The only issue i see is if you forget to turn the switch off you will stall the engine when stopped. Maybe a system when under 60kph the system reverts to original ECU control.

    Rusty.
    08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
    06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
    Sometimes i wake up Grumpy, most times i leave her sleep.

    Comment


    • Rusty62
      Hi Rusty, I think I could live with that, My nephew fitted a lock up kit to his 200 series from Wholesale Autos and that is all they have, he said it is all good. Your last bit sounds good though.
      We nearly didn't have a prado to fit a switch to as driving into Darwin yesterday a chap in a flash black commodore shot out on a intersection and "T" boned us in the R/h rear wheel, spinning us 180 degrees back into oncoming traffic. Bugger all damage, will need to have a wheel alignment to check rear end though. Tough machines, Holden came off a bit worse losing front bumper assembly and a few bits. Anyway all seems good so we will catch you up later. Cheers mate, Bill.

      Comment


      • Lucky you didn't end up sunny side down. If you can find a wheel aligned who will check the rear axle if it is bent.

        Was in Darwin last year. Great place. Will be in Katherine end June on our way to Broome.

        Rusty.
        08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
        06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
        Sometimes i wake up Grumpy, most times i leave her sleep.

        Comment


        • You guys are making me jealous with all this gallivanting around. I'm still grounded for another 6 months yet.
          I've just finished bench testing the MATCU after completing the software for the Manual and TCC Locker modes.
          If all goes well, and the ECU doesn't complain with fault codes, my auto release TCC locker will be looking for a home if anybody want's it. Here's it's details: https://www.dropbox.com/sh/eq3pu6e7f...OomAu6lra?dl=0

          Cheers all
          Bob

          Comment


          • Originally posted by Rusty62 View Post
            Have been watching this thread with interest. So much so on the weekend measured voltages and current for the lock up function. Lucky for me my son is an electrical engineer.

            So far all the wiring diagrams from suppliers have been wrong or not for my VX 120 series. We found the wires on the gearbox and traced them back to the ecu. From there we measured voltage - anywhere from 1/2 lock @ 3.048 volts 0.564 amps and through to full lock at 6.78 volts 1.016 amps.
            Now to design the relay to make it work. Something about a DPDT latching relay and a 25 watt load resister powered from an external 12 v source. Momentary push to lock and brake light power to unlock.

            If it works might do up a kit and sell them.

            Rusty.
            "So far all the wiring diagrams from suppliers have been wrong or not for my VX 120 series"
            Are you using the original Toyota wiring diagrams? If so I'm surprised. I've found them to be 99% accurate.
            Make sure you have the right version circuit. Their manual is fairly complex to drive until you get used to it.
            Here's the full manual: http://moranbahweather.com/toyota/
            View with IE. Other browsers don't work on this site.
            Bob

            Comment


            • Originally posted by chardo View Post
              Rusty62
              Hi Rusty, I think I could live with that, My nephew fitted a lock up kit to his 200 series from Wholesale Autos and that is all they have, he said it is all good. Your last bit sounds good though.
              We nearly didn't have a prado to fit a switch to as driving into Darwin yesterday a chap in a flash black commodore shot out on a intersection and "T" boned us in the R/h rear wheel, spinning us 180 degrees back into oncoming traffic. Bugger all damage, will need to have a wheel alignment to check rear end though. Tough machines, Holden came off a bit worse losing front bumper assembly and a few bits. Anyway all seems good so we will catch you up later. Cheers mate, Bill.
              It seems when it comes Toyotas and Holden... The Holden really proves it's just holding together... 10 years ago, I was leaving my house in my VT Clubsport and acting a bit of a goat I gave it a bit of a squirt as I left my driveway forgetting about the fresh gravel I just smoothed out. Car steps out, traction kicks in and launches me head on into my fathers 6 month old Camry. I was doing maybe 10kmh when I got him. Destroyed my front bar, bent the rebar and radiator support. Camry? All it had was the imprint of my licence plate on its bumper... nothing else.

              Yes I deserved it, but bugger me dead... the damage to the Holden still can't believe it today!

              Anyway, back on topic, I have a customer who actually spotted this thread and has enquired to me about it. Looks like I have 14 pages of reading to do!

              Comment


              • Hi all, looks like there is a nice little market opening up here. I definitely haven't got it to construct one of these little beauties, but I do need one for my van towing, ( hopefully not too far away now). All I want is a very simple one with a switch on it if someone can help out.

                RanJ, I gave the Prado R/H side bumper and wheel a good dose of Xtra Cut polish and Chardo looks like new. She will get a all wheel alignment on Thursday, but I am quietly confident nothing has shifted as in the way it steers when I let the steering go on the open highway. She needs a few plastic clips on the mudguard flare and brand new. Wat a rig. I luv it. ( but it needs a torque converter lock up kit to make it complete. Better go. Take care, Cheers Bill.

                Comment


                • Installed out fiirst test unit last night. Works as planned, push button to lock and brake pedal to unlock. Have a issue with a ecu alarm but think we have a fix for this. More after the weekend.
                  Would like to have it sorted before Easter to test towing.

                  Rusty.
                  08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
                  06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
                  Sometimes i wake up Grumpy, most times i leave her sleep.

                  Comment


                  • Prototype 3 in and working. Push to lock and brake light to unlock. Prototype 2 still chucked a ecu alarm.

                    Will now look at building a kit in a small box with the resisters on a small alum plate. Now the hard bit, not all 120's are the same. The VX and Grande have traction control and have different wiring harnesses. The GXL ( standard) and GX don't have traction or stability control and may work differently so for now these will suit the VX and Grande. May look at if we can get the plug (male and female) so no need to cut and solder wires at the ecu.

                    Until this is proved over a few months will not build any kits.

                    Rusty
                    08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
                    06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
                    Sometimes i wake up Grumpy, most times i leave her sleep.

                    Comment


                    • Rusty can you post a picture of the plug. I have access to many different plugs and sockets with many of them suiting Toyota's. I can probably steer you in the right direction for a supplier.

                      Even if you can tell me the connector number in the Toyota repair manual I can look it up.

                      Comment


                      • Hi all

                        I was talking to a Ford mechanic yesterday. He tells me there is another risk associated with the use of TCC lockers, apart from the obvious risk to selection clutches, with those simple lockers that don’t unlock the TCC during gear changes.

                        The new issue is the design maximum torque of the torque converter clutch when engaged. There will be some maximum torque figure, above which it will slip. If this occurs it will destroy it in a very short time.
                        The more I think about this, the more I believe this risk may be real.

                        Whenever a standard Prado is under heavy load the TCC is always unlocked. Think about why that may be!

                        This example may help:
                        If towing a heavy load, up a long hill, a standard 4 Speed Auto Prado may for example select 3rd gear and the TCC will always be unlocked. It will never lock in that high torque situation.
                        Now if we TCC locker users come along and force it down to 2nd and engage the TCC lock, we will benefit from lower transmission heat and improved fuel use. The engine RPM will be similar and the lower loss will yield more power to the wheels. I'm sure we all know that.
                        So with all those obvious benefits, why doesn’t Toyota do this?

                        I fear that some of us may find the answer the hard way.

                        If anyone knows of a torque limit issue on the Prado torque converter clutches, please let us all know. The question is: Will the TCC, when locked, cope with the maximum engine torque or not?

                        Likewise if you are a locker user and have any transmission failures please let us all know here.

                        Thanks
                        Bob

                        Comment


                        • Bob. Agree with your thoughts.
                          Our 5 sp will change to 4th gear and re-lock (toyota ecu) under full acceleration when towing uphill, providing you are doing 90 kph approx with no slip.
                          Will keep a eagle eye for slip in the tc when locked as well as looking at any temperature increases.

                          Rusty.
                          08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
                          06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
                          Sometimes i wake up Grumpy, most times i leave her sleep.

                          Comment


                          • Originally posted by RanJ View Post
                            Rusty can you post a picture of the plug. I have access to many different plugs and sockets with many of them suiting Toyota's. I can probably steer you in the right direction for a supplier.

                            Even if you can tell me the connector number in the Toyota repair manual I can look it up.
                            Didn't take a photo of the plug unplugged. Bugger.

                            Working on prototype 4 and mounting the tiny relays on vero board in a plastic box with terminal strips on the outside.

                            Rusty.
                            08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
                            06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
                            Sometimes i wake up Grumpy, most times i leave her sleep.

                            Comment


                            • Crickey, there is some real interesting stuff going on here by many rather smart people. Well done guys. In reply to the question today, re: how much torque is the lock up able to take.
                              I guess I might be the one the furthest down the track to have my say. Having done over 20k now and that lock up has been worked the whole time, it hasn't given one hint of a problem/slip. Strong as an ox. Just got back today from an 800k weekend trip down south WA (towing camper) and a million bends and hills to contend with. I can honestly say, that lock up makes it a totally different tow car. Without it, it is CRAP. Mr Toyota needs a bloody lesson on shift programming, because he got that wrong. I change up and down constantly with it locked and it is SOOOO good. Not harsh or "jerky" (if thats a word??). Not a hint of slip, just a perfect change every time. No sign of oil going off colour, smell etc.
                              Anyway, lets see how it is after another 300k kms. Then we can say heh?
                              Keep up the good work guys on the more sophisticated units. I read with interest.
                              Cheers, Jamie

                              Comment


                              • Hi all.

                                The 4 Spd MATCU mentioned previously is in and running fine. No ECU codes triggered to date, even with configuration splits like ECU thinking it’s configured 4th gear with lock OFF, while the MATCU has actually configured 1st gear with lock ON.
                                It’s simple to use and foolproof. This is the ultimate A/T mod from the driver’s point of view.
                                If your keen, you can alter the source code to change its behavior altogether.
                                Alternatively you can modify its various threshold tables to change its trip points to suit your specific vehicle characteristics.
                                For example, the thresholds have been setup for my V6 petrol Prado. A diesel, with its different torque characteristics, could operate with the TCC lock ON down to lower speeds.

                                The data is here: https://www.dropbox.com/sh/s97o8wisy...oT8OSzFDa?dl=0

                                If reviewing this, start with the file “Prado 4Spd MATCU - System design Rev 4.docx”
                                I’m sure the amount and complexity of the data will scare most people.
                                Most of the data relates to software development, troubleshooting, debugging and programming of the system.
                                You could avoid all that by having somebody supply a preprogrammed microcontroller. All you have to do then is copy the prototype that I’ve built or have somebody do a PCB, which would simplify the assembly process.
                                Others that go the “whole hog” and setup the development environment could supply preprogrammed microcontrollers to those that don’t wish to go to that extreme. If desperate contact me and I will arrange something.
                                Since this is more than a TCC locker I’ll post it to a new thread in case others are interested.
                                If anybody needs any help or clarification with any aspect of this don’t hesitate to contact me, preferably by email as I don’t always look here.

                                Cheers
                                Bob
                                [email protected]
                                BigFoot120
                                Lurker
                                Last edited by BigFoot120; 26-03-2015, 08:56 PM.

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