Simota CF650-6 Air Intake Review

[NYC-SE]

This still doesn't make sense to me. For one thing the Yaris auto has a lock up torque converter, so there should be no affect from that. Essentially there is a direct connection between engine, trans, and wheels when torque converter is locked up. (I may be wrong but I seem to remember reading somewhere that it locks up at 5MPH.?) No gear ratios have been changed, I don't see how engine can be turning at a lower RPM while wheels are turning at a constant MPH.

[invader166]

Originally Posted by NYC-SE

This still doesn't make sense to me. For one thing the Yaris auto has a lock up torque converter, so there should be no affect from that.

That's true, but isn't the torque converter lock-up function on the Yaris performed by an electrical solenoid on the transmission, that's being controlled by the ECU?

In fact, I found an article about how on some auto transmissions, it's actually possible to perform this torque converter lock-up yourself, at almost any RPM you want, overriding the ECU settings.

http://ecomodder.com/wiki/index.php/...nverter_Lockup

But now, what I'm trying to figure out is why this happened. Why did the ECU change the torque converter lock-up speed?