i have a z24 1996 and for the past 2 weeks the check engine is coming on and when a put the scanner it read like this torque converter circuit stuck on and when is running it start to sheke the whole car when i'm about to stop and i really need help to know what is the torque converter circuit and where is located to see if i can fixed please need help anyone i truthfully apprecciate the help n concern n time u take to explained to me .

Torque converter clutch (tcc) is a great thing when it doesn't have problems. It locks the converter 1:1 and lowers rpms and helps gas mileage and keep the fluid temps down. Being that you have a 96z24 you should have a 4t40e trans. The tcc solenoid could be worn out and causing it to stick. The reason I don't think you have an electrical issue is because if the solenoid was full on all the time your car would stall when you were at a light. Sometimes this is also a sign that your pump could be getting weak in the trans and has a hard time building pressure to release the tcc. I had this happen to me and shortly after the pump was gone in the trans. If I were you I would drop the pan and just take a look at your filter. If you haven't had regular transmission services, then I would save the trans fluid you drain and I would reuse it especially if it's a high mile car.

Douglas i be thankful 4 your advised i will take care of that u know in puerto rico they sale a transmission oil and they call it witch doctor i will try it to see but if not i will do what u say thanx a ur welcome to write back is good to know that i have a new friend in the states att jose 1973