explain the TC to me please

[melmount]

1) the tc multiplies power, right? When and how much? 2 to 1? 3 to 1???(approx)

2) does it do this multiplying when its locked at all, or is it straight 1 to 1 direct drive when locked?

[NoRalPh]

You're talking about the Torque Converter?

If so, no, no "multiplying" of power at all. It's just a fluid coupling that allows slippage at idle and when locked-up you get 100% connection (no "slip" at all for efficiency).

It replaces the clutch only really so you don't have to disconnect the engine and wheels (the simple answer, in reality much more important to match stall speed with power range etc.)

[Hank]

Found this...............

YouTube - how automobile torque converters work

[melmount]

when you hear multiplying power,"something to do with the trans" whats that?

[melmount]

cool video, thx
Int he vid it shows the tc clutch. If that clutch gets worn old like a standard trans clutch, will the tc still work normal just not lock up or is the car stuck like a standard trans with no clutch left?
thx

[Highbeam]

I've heard that "torque multiplier" or "HP multiplier" before too and I'm here to tell you that it does multiply these TQ and HP. By a multiplier of 1 or less. You won't get any more HP or TQ out of the TC than what you put in.

The reason for this myth is that the unlocked TC allows the engine to rev up into the powerband where more HP and TQ is available.

The theory is that a 20% slippage at the TC is more than made up for by allowing the engine to rev up to where it makes more power.

Going down the road with the TC locked up you will not see any benefit from the TC.