The album was the first big challenge of the band, because it was not known what the public reaction would be to the new member, who had to go through many conflicts to adapt with his peers. However, the album had a good reception and contained hits such as Disco ruido and Adiós a la escuela. Teen Band (1985-1987) In 1984, Timbiriche, along with several other children actors and singers, starred in a version of the play Grease (called Vaselina in Mexico). The play was produced by the actress and producer Julissa. From this staging comes the album Timbiriche Vaselina, which was another success of the grouping. The album released the hit singles Amor primero (Those Magic Changes), Rayo Rebelde (Grease Lightnin'), Freddy mi amor (Freddy My love) and Iremos juntos (We Go Together). For 1985, the group begins an evolution. They were no longer a children's group, and this situation leads to a new, fresher sound aimed at teenagers. This change is evident in the record Timbiriche Rock Show, released in 1985. But in the middle of the success, Benny decides to leave the group in September of that same year, after the recording of the album and after to have participated only in the promotion of the first two singles. His reason was that he wanted to prepare in music by enrolling in a school in the United States. The chosen one to replace it was Eduardo Capetillo, that already had been made known before for his stellar roll in the play Grease. Eduardo is the one who performs the rest of the album promotion. From this production stand out songs like Teléfono (cover of Sheena Easton's song Telefone (Long Distance Love Affair)), Juntos, Soy un desastre, Corro, vuelo, me acelero, Me planto y Mi globo azul (cover of Nena' s song 99 Luftballons). In August 1986 Sasha, another founding member, announced her departure from the group in order to become independent and launch herself as a solo singer. A month later, her place is occupied by Thalía, who had been announced a few years ago in a children's musical group called Din-Din, and also served as a substitute for Sasha in the Grease play.<ref>[https://www.helloforos.com/t/thalia-din-din-y-moderna-nina-del-rock/58940 Helloforos.com: Thalía, Din-Din and Moderna niña del rock]</ref> In 1987, Timbiriche released the album Timbiriche VII. With this album, the group obtains a success superior to the one of the previous disc, consolidating