Was driving home last night and loud noises came from under car and it started to slow down so stoped went to take away and could not backed up a loud banging noise started but it would let me drive on a few more feet till it locked up got pushed on by defender it unjamed but got towed clear of traffic and turned of engine restarted it now noises have gone but the drive still seems tight what could the cause of this its a 2.5 auto