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  • Torque Convertor lock up instal

    I've just completed a DIY "torque convertor lock-up" on my 2003 1KZ Grande. Should have done it long ago. Works an absolute treat. I engage it once in 2nd and let it change up while locked. Changes brilliant. Stops the thing revving its little heart out and pushes the car along instead. Will drop into 4th @ 50km/hr and give 1100 RPM if under light throttle. Still pulls away at that too, but don't expect neck snapping acceleration that low. Heavier acceleration will change up later of course. Trans will kick back to 3rd about 40km/hr but won't drop back further than that. A touch of the brake pedal cancels the lot. Obviously if you don't use the brake it will just start shuddering once it gets to idle revs or lower. On hills it will kick back with only a slight jolt or you can swing the gearstick across to 3rd no problems. Haven't yet, but would be a hoot for towing.

    I used 4 reverse/change over relays.

    1. A "Main change" relay
    2. A "P" and "N" relay (to prevent lock up while in "P" or "N".
    3. A "Hold in relay".
    4. A "Brake" relay. (To cancel the whole Lock-up).

    If anyone interested I can supply a wiring diagram and/or advise.

    Oh, the best bit. Cost me $20 all up and half a litre per 100km better economy so far.

    Jamie

  • #2
    Hey Jamie, I'm definitely interested in the setup! Please provide as much info as possible!!!
    2005 Prado TD Grande, 2 inch lift, Powerful 4x4 Rooftop Tent rack, 120w LED light bar, Ironman Snorkel, Leigh's Voltage Booster, Airbag Man Airbags, Homemade Drawers with MSA dropslide, Pacemaker 3 inch exhaust system, Performance EGT gauge, Safari Dtronic Chip

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    • #3
      Sounds great mate. I'm keen to know more.
      Cheers Ben.

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      • #4
        Put me on the list too! Definately keen to see the wiring detail. Cheers.
        Cheers
        Micheal.

        2008 GXL D4D Auto. GOING... GOING... GONE
        2015 GXL 1GD Auto. And it begins again...

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        • #5
          Nice work. Smart thinking.

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          • #6
            No probs guys, just give me a day or so to get it together. Turns out bigger than Ben Hurr.

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            • #7
              Prado Torque convertor lock up instal

              http://rapidshare.com/share/0178F952...BFDF992A91EE87

              Hi all,

              Sorry about the wait, please click on the link above to download the instructions for the Prado Lock up set up.

              The link looks like a front page, but if you click "to download", it then allows you to download the word document, so you just need word or an equivalent to open it.

              Jamie.
              Davis Dieso
              Junior Member
              Last edited by Davis Dieso; 18-06-2014, 11:29 PM.

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              • #8
                Thanks DD looking forward to digesting and maybe even understanding it!!
                Cheers
                Micheal.

                2008 GXL D4D Auto. GOING... GOING... GONE
                2015 GXL 1GD Auto. And it begins again...

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                • #9
                  Yeah 120d4d, it will be a bit daunting reading it all first up,but when its boiled down to bit by bit it may make a bit more sense. I don't know how it would differ for a D4D?
                  just message if in trouble...
                  Cheers, Jamie

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                  • #10
                    Anyone had a crack at this yet??

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                    • #11
                      I'm keen to give it a go - just haven't had time to look into it yet. Hopefully I can adapt your design to suit the 90 series. How have you found yours now you have had it in for a while DD?

                      Cheers Ben.

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                      • #12
                        Appreciate your efforts dd.

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                        • #13
                          It makes a huge difference to the cruise control.On slight hills it only kicks back 1 gear instead of 2. and even when you come across a steeper hill the kick back is not as violent.

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                          • #14
                            Its been a month or so now and haven't done any towing yet but will do in 3 weeks so keen to try it out.
                            I can't imagine driving without it now. I lock up the convertor once in second gear and it changes up smooth and direct. Quite a gap between 2nd and 3rd with a smaller gap between 3rd and 4th. Kick downs from 4th to 3rd (eg) aren't an issue. As I've said before, it'll go right down to 40km/hr with slight throttle in 4th, starts to get a little growly! Remember, anytime touch the brake pedal cancels the lock up.
                            My advice to anyone contemplating... Just do it.

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                            • #15
                              This is fantastic jamie. I imagine it would be great for towing. The no slip power/drive of a manual with the clutchlessness of an auto. I'm going to get my auto electrician mate to wire it up into my D4D.
                              Although I do feel the park/neutral lockout is redundant as the shift lock means you have to have your foot on the brake pedal to change to/from those gears, which foot on brake =lockup disengaged. Can you see any problem with leaving that relay out?

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