quick question about swapping transmission fluid

[ALLSTOCK]

https://www.opmustang.com/store/p4/...II_Synthetic_Gear_Oil_-_MT82_Kit_.html.html#/

So i recently ordered this syncro shift fluid and im planning on putting it in in a few days.

Do I need to do a full flush of the existing trans fluid? If so, how much extra fluid should i purchase?

Thanks!

Apologies in advanced if this has been asked already!

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[BmacIL]

Just drain the old fill with the new. The kit includes more than enough.