I drained the trans & diff the factory makes no mention of a diff fill procedure however it does say that the drain & refill capacity is 5 qts w/o diff but no mention of w/diff as I approached 4 qts it was coming up on the full Hot mark so I quit. how can I be sure that the diff is full?
^^What he said. The differential cavity holds around 1.5qts (if you open the differential drain plug) and the trans pan about 3qts. They both fill through the trans dipstick tube.
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It worked fine until I fixed it!