[Stan Weiss]

Originally Posted by lust4speed

I must be missing something. Engine produces exactly the same amount of torque and the load on the converter remains the same, and therefore the stall speed will remain the same as long as the tires stay hooked.

I click the button on for the transbrake and slam the pedal to the floor and see 5,600 RPM. Nothing is moving and the stress is constant. I release the transbrake and the 14.5x33's don't slip at my power level and the tach remains at 5,600 RPM until wheel speed catches up. My way of thinking is this applied load happens exactly the same whether I have 4.56's or 4.11's or any other gear. Outside the car changes in acceleration and speed do happen between gearsets, but not with what the converter is seeing. I'm saying that converter slippage and stall remain constant regardless of the rearend ratio as long as there is no tire slip.

Am I wrong?

In this case things change because the trans brake closes off the rear gear or tire change. Once you release the trans brake if you have data logging you will see some differences in driveshaft RPM for the same engine RPM.

Stan