E4OD Shifting too firm

[core-rider]

I already asked on the Stinger forums, but they are being slow to answer...

I already have a Level 10 shift kit installed on my truck which already gave a more firm shift. Now with the PiMPxShift it's just too firm. How much do you recommend changing the line pressures at a time to see a change?

[ASAP]

Is the converter locked up on shifts? I would check that first. I’m sure you’ll get more input shortly directly related to the software..


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[Jamie V]

I’m not sure if I can help. I never had to change any of my shift firmness settings.

[Raymond_B]

I already asked on the Stinger forums, but they are being slow to answer...

I already have a Level 10 shift kit installed on my truck which already gave a more firm shift. Now with the PiMPxShift it's just too firm. How much do you recommend changing the line pressures at a time to see a change?

I've allowed msq as an accepted attachment, please post your file.

[core-rider]

[Raymond_B]

Just to verify you are running a 27" tall tire? Stock is 30"

[core-rider]

Yes... 255/50/17. I'm actually still playing with tire size as the speed isn't quite accurate.

I think I posted the tune file correctly.

[Briansshop]

Drive the truck and watch the live data. In the areas where it shifts too firm,reduce the pressure. Smooth the line curve up to 100% at full throttle.

[droppedf100]

I knocked a bunch of line pressure out of mine. Especially on the part throttle 1-2 shift.

[FMOS Racing]

Like Joe said, I really reduced my line pressure for my built transmission a lot, too.

I've attached my current trans tune.

[core-rider]

Yes my 1-2 shift is the worst. At about 10mph maybe 10-20% throttle it just slams into gear. I’ll look at your tune file and see how different the pressures are. Thanks fellas!


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[FMOS Racing]

Pressure 10 13 24 70 90 92
Load 0 17 45 58 70 100

Keep in mind that no matter how low you decrease the pressure, you cannot go below the physical characteristics of the valve body. My first two or three "pressure" numbers are probably artificially low, meaning that the spring pressure is probably higher than what I have the pressure value set to.

[core-rider]

Pressure 10 13 24 70 90 92
Load 0 17 45 58 70 100

Keep in mind that no matter how low you decrease the pressure, you cannot go below the physical characteristics of the valve body. My first two or three "pressure" numbers are probably artificially low, meaning that the spring pressure is probably higher than what I have the pressure value set to.

I haven't had time to look at your msq file yet, but I'm guessing those are your numbers for pressure and load? I'll be fine if I can get back to the Level 10 spring pressure settings as they've been fine for 20+ years... firm yet not unbearable like it is now.

[core-rider]

Those settings seemed to do the trick. Feels MUCH better on 1-2 and 2-3 shifts!

Played with AutoTune for a bit today and man that is convenient for us noob tuners! I guess I’m doing it right... just turned it on and started driving around. Applied the changes and saved them to the ECU.


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[Jamie V]

After a while it will start chasing its tail changing the VE table back-and-forth in certain cells depending on driving habits.

Once you get to that point what works well is datalogging a nice long drive with your laptop and then running an autotune on the datalog in megalog viewer.