Wow what a long thread!
Well my AL4 box is dying too... There's this buzzing sound coming from the gearbox for months now, and it sure sounds like the solenoid valves. Few days ago, the lockup valve died twice on two different days.
How do I know it was the lockup valve? Well, when it died, the buzzing disappeared, but gears still changed from 1 to 2 and 3 only without torque coverter lockup when 2nd gear is engaged. So my second gear was spinning high rpm before going into 3rd. The snow/sport lamps didn't flash though, which is weird.
Anyway restarting the car gets the gearbox to normal operating condition but with the buzzing solenoid alive again. I hope it stays alive until I receive a new pair of Borg Warner solenoids, whic I plan to install and then update the ECU.
my206xr.blogspot.com
Same goes with me.
I will get a loud crack sound and a jump (as if I shifted wrong gear) once daily, with the Snow and Sport mode flashing, Faulty Gearbox sign, and the typical humming sound. I will be sending my car to the SC (3rd time) to get this fixed as it is still under warranty.
During the error, if I stick to slow speed, gentle driving, it is fine. But if I push it hard, the RPM will go screaming high with no power.
