hey guys! a friend of mine has a 535d for about a year, last year he rebuilt the box with new clutch packs, and solenoids for the mechatronics, and it was driving perfect, but after driving to dubin yesteray he encountered a problem, it seem the lock up for the torque convertor is locked on constant? it drives fine, changed gear fine but when stopped and in R or D it is trying to stall, like the convertor is not disengaging, there is no fault codes showing on inpa, today we dropped mechatronics unit and changed the tcc solenoid, but it is still the same, anyone have an idea of what would cause this? im thinking torque convertor? thanks for any help guys !