This investigation was opened after ODI was notified by a fire rescue authority that they had multiple driveshaft failures on four of their fire trucks. Allegedly, one driveshaft was ejected from the truck as it was being driven on the highway at a high rate of speed. Sutphen conducted an engineering evaluation and then decided to conduct a safety recall.They will: a.modify the cross members on the pre-2007 vehicles; b.conduct driveshaft re-phasing on the post-2007 vehicles; and c.replace the frame cross members.The action taken by Sutphen resolves this investigation. Accordingly, this investigation is closed.