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when idleing it revs up and down. and driving at 40-65 it slips and the trans finally changes gears.it also wont go past 70 mph and has no power going up hills or on freeways.when i start it it makes a loud squeek like a belt needing to be tightened.sometimes when i turn the key over it does nothing no turning over or anything.then i do it again and it starts.

Vehicle: 1996 Honda Accord 4 cyl
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1 Answer

P0740 TCC (torque convertor clutch circuit) circuit malfunction

The TCC will not cause a transmission to slip but a slipping transmission will cause  P0740, Reving up and down, check for vacuum leaks,that will cause the up and down idle, and also check for coolant leaks, there is a idle control that is controled by the cooling system, When you turn the key and nothing, there is the ignition switch (the electrical part) that seems more like the culprit.
answered by (10.8k points)

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