So talked to transmission guy today , planetary gears are stuffed, caused by I think he said the thrust bearing massive failure and collapse which was probably caused by poor oil flow through the trans cooler.
Pic of scrap metal in pan tray.
Like I said dearer than I thought it might be and I imagine some would say that's very expensive but price hasn't changed.
I'll get a box that if I look after it should be easily good for 10 to 15 years. So it all includes a new flex plate, good quality low mileage planetary gear set and associated parts, apparently you can get a wine if they're not matched, heavy duty clutch packs, stronger bands, new trans cooler radiator with lines rerun to bypass the engine radiator, stage 2 shift kit, 2nd gear servo cylinder, stall and converter to match my current setup and he's also fitting a new rear main seal.
Should be done by the middle of next week.
He recons I won't be disappointed, so looking forward to seeing what it's like. Hope I'm not imaging more than what it will really be , because the cost of going this way means I'm committing to spending a bit more on other parts to have it work together and to keep it for at least 5 plus years.