Mine had the following faults, when scanned after the barrel connectors opened. All clear now. I know it’s not the same issue you have, but it shows how clever the auto/car is at knowing/checking its symptoms of failure. Hence my surprise at no codes. Hence wondering if their kit couldn’t extract codes from the auto? They should know what they’re doing in they’re specialists. Splitting the barrel connectors and scanning again would prove this either way.
Think the following is correct (rough notes at the time):
0715 input turbine speed sensor A circuit
0705 Inhibitor switch input multiple/no signal
0753 shift solinoid A electrical
0758 shift solinoid B electrical
0763 shift solinoid C electrical
1785 shift/timing solinoid
1786 RDCN timing solinoid short circuit to ground/battery
0748 pressure contro, solinoid A electrical
0743 torque converter clutch solinoid electrical
1605 faulty controller eeprom
With there being no sudden bang, loss of power, scraping noise etc whilst moving, and assuming the fault started one day after starting, then I’d be thinking the fault was more of an electrical failure, than mechanical. Thinking out loud here… I’m not an eggspert on cars/auto’s. Hence I’d be thinking of trying out my own tests by measuring the resistance of all the solenoids etc, by splitting the barrel connectors and using a multimeter to measure the resistance. That was done on my auto after the dealers had checked the oil level (mine was leaking though). They considered a resistance check as mandatory to check all the stuff was in spec.
resistance check =
http://www.youtube.com/watch?v=VTmdkDuKZ6A
The following is a jatco auto diag sheet. Shows resistances and where to connect to, to measure them.
http://www.muddyoval.com/articles/fltech/transmission/JF506E Supplement Part 1.pdf
just noticed ashcroft transmissions sell diy rebuild kits
Ashcroft Transmissions
parts
http://ebolinx.no-ip.org/data/jf506e.pdf
more codes
JF506E transmission troubleshooting help, JF506E rebuilding tips, JF506E technical service bulletins
data
Jf506e Gearbox Overview
another eggsample
http://www.helc.net/Transmission_Test/tranxpages/asian/Jatco_5_Speed.pdf