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Modding the A340LE transmission

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    #31
    If i'm lucky I might make it in time. I'm fitting the diff now.
    10.83 @ 125

    Quickest stock exhaust manifold stud 2JZ in Aus.

    Originally posted by cracka
    Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

    Comment

      #32
      Get to it mate! I am leaving in 20 mins
      state street drift champion 2003

      Formerly known as bassaholic55

      Comment

        #33
        I flushed the trans with about 10 liters of type 4 and took it for a spin to test the mods. The shifts are firmer and shorter but not as firm or as short as I would like. It still farts on the changes, specially first to second. I think some more aggressive shimming is needed.

        On the bright side, I know how to do it now and I didn't fuck anything
        10.83 @ 125

        Quickest stock exhaust manifold stud 2JZ in Aus.

        Originally posted by cracka
        Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

        Comment

          #34
          you know that the farting on the 1-2 shift is the computer reatarding the timing right
          This is a post i wrote by mistake, which is nice...

          Comment

            #35


            Long shift = long farts.
            Short shift = short farts.
            Slam shift = no farts.

            This is what I have been hearing from people with shift kits. The ECU only retards during the shift, so the farting is a good way to judge the effectiveness of the shift kit. If it used to take 1.5 seconds change you get a 1.5 second fart. I you run rods in the accumulators it smashes into gear and the farting is pretty much eliminated.
            10.83 @ 125

            Quickest stock exhaust manifold stud 2JZ in Aus.

            Originally posted by cracka
            Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

            Comment

              #36
              Rod me baby.

              I have rods in mine.

              It shifts instantly-but not a particularly smooth shift......(obviously)

              I've got the motor out at the moment for a bit of work, so I'm having the trans checked over too.

              It's condition should be a good indication of exactly how strong these boxes are.
              Adjustable cam gears for 1FZ-FE now ready for sale - 10 degrees advance/10 degrees retard. Suitable for all variants of 1FZ-FE.

              (adjustable scissor gear for changing separation angle between the intake and exhaust cams coming soon)

              International sales welcome - PM me for pricing.

              Comment

                #37
                Do you use the 5 solenoid box?
                10.83 @ 125

                Quickest stock exhaust manifold stud 2JZ in Aus.

                Originally posted by cracka
                Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                Comment

                  #38
                  that would be an A350?
                  This is a post i wrote by mistake, which is nice...

                  Comment

                    #39
                    Originally posted by GSRman
                    that would be an A350?
                    Na its the A340LE 2JZGTE box. Look at my pics.

                    10.83 @ 125

                    Quickest stock exhaust manifold stud 2JZ in Aus.

                    Originally posted by cracka
                    Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                    Comment

                      #40
                      I really want to know how to increase line pressure. I'm not sure that thingo I turned up did this. AFAICT one of the solenoids controls line pressure. If I know which one it is I could maybe figure out a way to magnify the line pressure. Also, line pressure increases will cause faster and former shifts won't it? I am thinking that my shimming might need an increase in line pressure to work more effectively.
                      10.83 @ 125

                      Quickest stock exhaust manifold stud 2JZ in Aus.

                      Originally posted by cracka
                      Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                      Comment

                        #41
                        Yes. I think from reading those other fora, the line pressure is either controlled by a cable, or electronically. So the cable might be just for kickdown which is pretty irrelevant for what you want.

                        Hmm, I might need to read more. Do you reckon the base pressure is no higher? Shifts are a bit faster but no harder?

                        Comment

                          #42
                          The cable isn't for kickdown, they have a kick down switch. It is a mechanical line pressure controller afaik, much like the TH700 uses.
                          You have to ID the line pressure solenoid and alter the duty cycle on it.
                          Sounds like something you would be keen on Dennis.
                          David Fraser - Automotive Historian!

                          Originally posted by bigmuz
                          You can't polish a turd but you can put 600hp in it and laugh your fucking arse off coming past someone sideways at Powercruise.

                          Comment

                            #43
                            You have to ID the line pressure solenoid and alter the duty cycle on it.
                            Sounds like something you would be keen on Dennis.
                            That is the plan.


                            The shifts feel firmer. But is that because of the shimming or line pressure? And I think I can hear the fluid moving through the box. Which some people were saying is a side effect of increased line pressure. Maybe the thing I adjusted did increase base pressure and the solenoid gives any father increase in line pressure"? If I knew more about autos I might be able to figure out which solenoid it its and take a look at how it modifies line pressure.

                            Yeah the cable on the 1UZ and 1JZ trans controls line pressure.
                            10.83 @ 125

                            Quickest stock exhaust manifold stud 2JZ in Aus.

                            Originally posted by cracka
                            Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                            Comment

                              #44
                              The line pressure solenoid should be identified on the ecu pinout. You just need to know what the abbreviation for it is e.g. LP. Then alter the signal from there.
                              David Fraser - Automotive Historian!

                              Originally posted by bigmuz
                              You can't polish a turd but you can put 600hp in it and laugh your fucking arse off coming past someone sideways at Powercruise.

                              Comment

                                #45
                                OK, cool.

                                1jz ftw :D

                                Comment

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