On April 13, 1975, music critic and record producer Jon Landau officially joined the album's production team, marking the start of a life-long professional relationship. At Landau's suggestion, production was moved from 914 Sound Studios to Record Plant studios in Manhattan. When sessions began on April 18, Jimmy Iovine, fresh from recording John Lennon's "Walls and Bridges", replaced Louis Lahav (who returned to Israel in March) as engineer. Bruce later describes as a "brilliant imposter" and a "young studio dog with fastest learning curve I've ever seen". After three intensive days (April 18, 19 and 23) working on "Thunder Road", nothing further was noted in studio logs until July 15–16, when final overdubs and mixing were done.