Property dispute

Hello, Please consider my case mentioned following:- my father has two brothers out of which my father is elder.They lived in rented house . After few years,they purchased that house in the year 1972 in the name of my father's younger brother I.e.my uncle(unmarried at that time) and me as co-owner.I was minor at that time and the property was signed by my uncle only.Both were living together afterwhat.My father died in 2007. Till now ,we were living together. I changed the half ownership title with side to my wife in 2002.Now, my uncle claimed full property giving reason that he purchased the property with his own money and with love and affection he added my name in the property in 1972.He filed a suite in the court now in 2016 and demanded the full property. We want your advice in the following things done :- 1.Had we done something wrong in 2002 while changing the half ownership title to my wife? 2.What will be decision of the case according to you? Please advice.