I did as Rusty recommended last night.
Drained from the return line coming from the radiator.
Put approx 15L through. It's still not clear red, much less choc milk, more like blood actually.
Testing in the backyard has me worried. It acts like it has a higher revving stall converter. Grabs hard at about 1200 rpm, forward or reverse. It's also shuddering noticeably. It's not good, yet. Maybe more flushage needed?
Smoke, steam or both, was coming out of the filler/dipstick tube within 5 minutes of gentle backyard testing.
Should I get more ATF (possibly cheaper version like senatorJ says) and keep flushing, or does it sound like it needs a rebuild, going off how it's driving now?
Not sure. Sink more ATF money down the drain, or bight bullets, and rebuild this tranny
I've rebuilt manual boxes and just about everything else on a car. Can I do an auto? I am keen to learn about them, with a decent manual, shouldn't be too hard?
Hmmmm.
More input form you experienced ones appreciated.