GS 450h V6-3.5L (2GR-FSE) Hybrid (2007)
(c)
Wait until the overflow slows to a trickle.
If fluid does not come out, perform the following:
(1) Install the overflow plug.
(2) Stop the engine.
(3) Remove the refill plug.
(4) Fill the transmission through the refill hole until fluid begins to trickle out from the overflow tube.
(5) Allow the engine to idle.
(6) Wait until the overflow slows to a trickle.