I just got through removing the pan for a fluid change and went to the store, Walmart and Auto Zone and neither had Dextron III transmission fluid. The young girl at Auto Zone said it was replaced with Dextron/mercon. I look up on line for some answers and it said that it was a suitable replacement for Dexron III for passenger cars and light duty trucks nothing about HD trucks or MH's. Those of you with the older 480LE's what kind of fluid do you use? Last two times I changed the fluid I used Dextron III.
