Help with a converter

[Adger Smith]

What Mark is saying is converters react to load. Static is always static, but at the initial car move the load on the converter is different due to the gear multiplication. It is more apparent with gear changes in the tranny than rear gear changes. Too many variables to guess. That is what data logging and testing is for. If you change the gear and don't pick up it might not be the gear ratio that doesn't work. It might be the converter doesn't like the less load of the steeper gear. Talk to "Your" converter guy. He should know how your converter is built and should be able to give you a SWAG....