Rep Power: 0

Hi Everyone, I got a 2004 Honda Civic with auto transmission and 200k miles (motor has 40k miles) for free from a relative. One issue this car has is the auto transmission slips when taking off as you can see in this video:
As you see I have to rev the motor to 2000 rpm in order to launch from stand still. Transmission fluid level was low so I filled it up with Lucas Transmission Fix and things got a little bit better but slipping is still there along with flashing green light at D range in instrument cluster.

I scanned OBD codes and got P2770: torque converter clutch circuit high. Searching about 2770 on the internet points to replacing torque converter clutch solenoid switch. I would like to ask you if you have had this issue before. Judging from the youtube video, will changing both solenoid switch A and B fix or improve this slipping or do you think I need a new transmission? Thank you for your opinion!

 
Rep Power: 222

Try changing the fluid. Do a drain and fill 3 times, with 20 mins of driving in between. See if it gets better

 
Rep Power: 224

Torque convertor lock isn't used until you're going ~50 mph. It wouldn't cause a slipping transmission.

 
Rep Power: 0

So do you think I should ignore P2770 code?
What do you think is causing me to press gas pedal a lot more than normal in order to launch the car from stand still?

 
Rep Power: 367

try fluid first, easier and historically helps the trans on these cars. no guess, test

 
Rep Power: 0

Thank you very much for suggestions. Which brand ATF do you recommend? Will any Japanese import ATF work for high mileage transmission like mine? Should I continue to add Lucas Transmission Fix?

 
Rep Power: 367

honda fluid. hondas are pick
my manual trans uses engine oil weight... nobody else does that...

 
Rep Power: 222

Vavoline and Total make fluids that are honda compatible, make sure you get the correct one. Stop using the Lucas

 
Rep Power: 222

Because the trans is slipping...