Gear Vendors overdrive

Revhendo said

This is what I mean about getting answers that don't directly address my question.
Plus I love being taken out of context......

So, simplifying......
You drive at 70mph and your engine is running at 3000 rpm. Your converter stall (the theoretical point where pump and turbine speed are the same?) is 2500 rpm. Things are happy, right?

You add an overdrive that drops your rpm below the 2500 rpm, then isn't your converter "slipping" which in turn creates HEAT?

Isn't this why modern AODs have lock up converters?

Click to expand...

No, because when you drop the RPM you also drop torque so now your convertor doesn't stall at the same speed, plus most of us are cruising at light throttle with the OD on so you aren't seeing RPM flare. Last, you should have a quality converter built for your application. My 3500 converter bumps into gear and can only be foot braked to maybe 1300 without pushing and twisting the car. But matt it or do the flash stall test and it will whack 3500 on the nose everytime.

You can actually read about this on their website.