'98 LS400 with 120K miles. Check engine light is on with a P0763 code, "Shift Solenoid C." I took it to the dealer and they basically suggested I buy a new trans. The shift solenoid is $190, new tranny $3,500+ ... Dealer said the trans oil looks clean, and I've changed it approx every 40K miles since I've owned the car. Its having a hard time shifting in between higher gears, and takes longer than usual to shift down when I press the gas. Would it make sense to replace the shift solenoid, or is