Does anyone mess with their converter settings to get it to lock under WOT per the ECM for more efficient power transfer to the tires? Is there a way to do this with the factory ECM while retaining the normal lock/unlock behavior in 6E? Once I'm doing more than ~30mph at wide open I want it to lock up so I stay in the power band but I can actually put the power I'm making down? I know a lot of modern drag racers use lockup converters in this way, and I don't know how the factory behaves for sure, but the general idea I can tell from looking at other threads is that under 100% throttle the converter stays unlocked, and that seems like a very inefficient way to accelerate (at least once you're in the power band)

 

Wouldn't recommend it unless you're racing and every bit of speed is necessary. If you're bent on the concept but are unfamiliar with tuning then your best bet would be to install a toggle switch and activate it yourself upon command and need whenever you want it to lock via feel. It is better this way as opposed to changing the tune because this way it isn't "always" locking it at wide open throttle, because believe me, it puts additional and unnecessary stress on the converter...

- Rob

 

Lucky (or unlucky) for me, I've blown this transmission once already, so I have a nice beefy allison converter, chromoly input shaft, upgraded clutches and servo, the total package. I'm not particularly worried about the parts, it's way overbuilt for my motor, and I want to learn how the tuning all works and if there's a way to do it.

 

Yes there is a way to do it. I haven't looked at the older XDF files in a very long time... but in my application I can control this for members via their MPH and TPS. Can force lock the converter starting from any MPH they want, or split the lock via a Low Gear or High Gear MPH setting. The TPS percentage, depending on when you want the converter to disengage, controls its' release... and just like with every other area of tuning, you base the when and where when watching your datalog.

- Rob

 

Perfect. The language and titles of the parameters in the ECM are not very clear on what actually does what, if thresholds are above or below certain throttle positions, that type of thing.

 

Would you mind taking a look at 6E and telling me how? I can't quite figure out which tables.