35 ain ' t bad at all . <| sep |> Drain and refill . Do it with the fill hole open and there should be enough head pressure to pull most of the sediment out of the pan . The tough shifts are a combination of old fluid and worn but not necessarily worn out synchros . The higher viscosity of the cold gear oil keeps the cones from engaging as smoothly . <| sep |> Thanks I ' ll see <| sep |> Winners won ' t be emailed till 2 pm PST . <| sep |> Obviously that ' s still a lot closer to a helicopter than a plane , but the little wings make me curious where do we draw the line between the two ? Like , I know a helicopter has a top rotor , but could I tape a propeller hat to the top of an SR 71 Blackbird and call it the worlds fastest helicopter ?