480LE Transmission Fluid Change
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 wit...
Forum Discussion
Worked heavy line for GM dealer which included 4L80. They were all changed over to D VI in 09. Be sure not to overfill this transmission as bad things will happen.
