Division of ancestral property among legal heirs

Hi sir/madam my grandfather as 4 sons(A,B,C,D) and 3 daughter(D1,D2,D3) and my grand mother has land from his father so after my grandmother died ,the land was transferred to her elder son (A) while my grand father alive without taking any sign from grandfather and other sons and daughter and after that land was disputed for 4sons in 2007 according to vibhagiya patra(Panchayath paripat) so in that they divided 4 part A,B,C,D and in my father section(D) after getting sign from my father for that document they edited the land values and given less land and phani also came in there names but none of the documents is not registered in sub Reg office so is there any rights on grand son to put suite and asking for equal share with present of my father(D)