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RE: How often should you change transmission fluid?
i did my tranny fluid at 45k. diff will be done at 50k when gears are installed. I do put the cheapest full synthetic in the motor (2 for 1 at advanced auto) but everything else is royal purple.
This is way wrong, a matter of fact ford now recommends 8.8 diffs filled with the recommended synthetic fluid are lubricated for life, only time its changed is when the rear needs to be repaired.