Hi whitexc,
Thank you for the tip to try and reset the clear memory again, I am currently on vacation with my family when I get a chance I try another clear memory 2 in a few days.
In regard to the the turbine 2 speed sensor, I sourced the sensor from Maktrans in Poland , sensor good price and shipping was good too ($75 Australian dollars Sensor and shipping total).
Because I was not sure if it would come from Poland (eastern Europe), I sourced a second one from a guy in New Zealand $110 Aud.
I tried to find it locally in Australia but cost was high Australia.
I used the sensor from Poland in my 5eat with no problems (which was identical to the sensor from New Zealand and by the look of it also Identical to ones on Ebay from some of the US sellers
Job was quite straight forward ,
drain fluid,
drop the 5eat oil pan ,
disconnect wiring harnesses on valve body,
carefully remove the black plastic atf filter (making sure not to lose the O ring)
carefully drop the valve body then (being able to solder will help you here as you will not have to splice the harness),
removing the cap on the sensor with a small flat screwdriver,
de soldering the three terminals (making a note of where each colour goes)
Soldering connections carefully to new sensor
(my sensor was a direct colour to colour match for the connections if you wanted to splice the harness)
bolting the new sensor in place,
and re assembing in the reverse order.
Someone I know with the 2-3 shift knock and error code p1710 was quoted by Subaru Australia $4000 (Aud) to replace the Valve body as they said the sensor was not available as separate part!
If you search long enough with google P1710 turbine 2 speed sensor fault, you will find images, you tube clips that will help you.
I have seen a few us sellers selling both the sensor and a replacement filter
Search New Zealand Legacy forums and there were some japanese forums with some info and good images, to show you what you are up against
When i get a chance I will piece together all the internet links I used to help me and post it up
The Part number of the sensor is 131958
(this is the 08 + sensor, prior to 08 the turbine speed sensor 1 and 2 were combined in one package)
I hope this helps