[CL9]&[CU2] You got Automatic transmission? *you'll WANT to read this*

[Fredoops]

So you are only dropping the oil that is in the tranny pan, what about the oil in the torque converter? Looking at the specs the tranny holds 6.2 litres of trans fluid.

You might need to do a few fluid flushes to get all 6.2 litres out and replace with new fluid.

You need 4+ flushes to get 90% new fluid.

2 flushes will get you 60odd percent, I'd do 2x flushes per service over 2 services.