I did use the correct fluid. I just added some fluid because when I drained the fluid I assume that all nine quarts were removed and that must not have included the torque converter and somehow maybe that drained out too, but I am not sure how. The wrench engine light also went off and the transmission started shifting g smoother.
I saw on another thread that some people experience some hard shifting and this started doing not a little bit but went away once I added fluid. Still not sure I have the correct amount but it seems to be better.
The method I used was simply draining the fluid just like you would drain the engine oil. I removed the plug underneath, replaced the plug and then refilled with Mercon LV fluid.
Should I be able to see the fluid level when I look down the rubber hose filler on top of the transmission?