Aftermarket gauge install help needed

[Hummie2]

Anyone know how is the tranny cooling pump is driven?

The torque converter IS the pump for the cooler Phil. Oil flows from the trans pump to the converter into the pump section fins of the converter. The oil that is thrown off the pump fins hits the turbine fins and starts it to turning driving the input shaft of the trans. Oil that exhausts the turbine hits the stator assy. and is redirected back into the pump section gaining velocity and giving torque multiplication at stall.The stator has a oneway sprag clutch that allows it to turn with the pump & turbine once the turbine gets upto speed with the pump as it is nolonger necessary and it would impede the flow of oil at that speed. Once the both sections of the converter near the same speed the lockup clutch can engage and mechanically lock both sections togather making the converter 100% efficient.

Its when the lockup clutch disengages under load and the converter starts to stall to some degree (about 400rpm @ 70mph in this case) that the oil is sheared and generates all of the heat.

Sounds complicated as hell, but is really pretty simple. Think of the converter assy. as 2 box fans sitting face to face. One plugged in and running (pump) the other not running (turbine). After a while the fan that is not running starts to turn also because of the air that blows across its fan blades.