can anyone help with auto box trouble .
says ( lock up duty solenoid circuit ) any ideas ..wont reverse but will go forward

 

Start by checking the Trans.fluid level and smell it to see if it is burnt.
You need to have the Line Pressure checked to see whats happening internally with the Transmission (Specialist job to do).
The Lock Up Duty solenoid is in the Trans. Oil Pan,so not east to get to but it
would be worth checking the Speed sensor on the back of the transmission
(upper one of the 2 sensors) to see if it is connected properly/wiring damaged or corroded terminals.
Hope some of this helps you.