727 leak

Hello , I've got a small leak that is gravitating to just below the speedo gear so pulled the speedo gear assy ( has brand new seals on it , inside & out) and put tiny slick of gasket sealer on oring then reassembled, thinking that might be it. Wondering if can be coming from somewhere else ? Seems to be a plate with screws and gasket by the the cross member mount so wasn't sure if that is possible cause.