P0741 Broken Piece of Ish 98 STS
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TCC is the Torque Converter Clutch. It should lock up at 41 mph. Yours is not, so there is a little bit of slippage. Worst case is you will run about 200 rpm higher at any given speed and thus your milage may suffer by about 1 mpg. . Repairing it may be costly as I believe the trans has to be removed. You might want to just drive it as is. Shouldn't do any harm
Sometimes the sensor itself is the problem. You can run or have a diagnostic run to check the sensor and shift points.
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