Before you can state that the trans is dead, the engine must be running properly and the fluid level must be accurate.
If you’re measuring and saying you got 4 Liters out of it, or 2, then you need to really tighten up your measurements. 200ml of fluid is the difference between the top and bottom of the range and temperature makes an even bigger difference.
Google the dipstick markings for this and understand what you’re reading.
To check, either hot or cold, the car must be idling, on dead level ground, in park and have both D and R engaged after start. The acceptable range is about 4mm. That’s right. 4mm.
If you want to change the fluid, OK, but the way you’re measuring isn’t accurate enough. I would get the IPD kit so you’ve got the hose and trans cooler line o-rings. You’ll need 14quarts of fluid. Make certain that the fluid is JWS-3309 or Toyota T-IV compatible. Personally, I would just go to your Toyota dealer and buy a case of T-IV. You won’t get a better JWS-3309 fluid, though you can pay a LOT more.
Make certain that when you’re done that the fluid level is within tolerance.
Then drive it and see how the transmission is doing.
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