Dear sifu,I was searching a UDM and finally i have found one which seems to be fairly good in condition from apprearance. The car is maintain by AB and is a 528 yr 2000 and has 150k KM on the clock.But when the mech plug in the computer, he told me he found an error on "Converter Lock up".I talked to the mech and also one of the local mech and both told me that is the prob of gear box. Potentially of overhaul is at high chance.Funny thing is that there is no light indicator on the dash board showing of the gear box and the run damn smoothly.Does any here experience this before what are the remedies beside overhaul the gear box? If overhaul, what is the expected damage?Please help ;(