Lock-up torque-converters have been around since the early 80's, and
> have been mainstream ever since. It's my understanding that by using a
> TCC (Torque Converter Clutch) you can achieve a direct mechanical link
> between the engine's crankshaft, and the transmission input-shaft. The
> hydraulic coupling that take place within the torque-converter is
> efficient, but it's not 100%, because there always inevitably be some
> slippage. I suppose the main benefit of using the TCC is better
> fuel-milage at high speeds. But seeing how this is a custom buildup,
> using the TCC would require fabricating circuits for both the VSS
> (vehicle speed sensor), and the brake-switch. I'm not lazy, I just
> want to keep things as simple as possible. Do you guys think I would
> notice much difference if I ran my 700-R4 with the TCC disconnected???
> unfortunately, i will be using the truck at highway speeds, but even
> so, is there any danger in running without the TCC???
Some 700R4's can't run with the TCC solenoid disengaged. I advise you check this webpage for information. It would not be difficult to make a switch to lock up the TC. It's just 12 volts.
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-Bruce