Just replaced clutch pack in my car and gears wouldn't engage so sent mechatronic unit to be tested and no faults were found so put it all back in. With the ignition on the dash shows p,r,d,n,s when selected but once I start the engine I can move the gear lever but nothing is showing on the dash and no gears are engaging and the car will not move even in neutral so I cannot even push it!! What's happening???