I agree with loepke72 above.
No way that fresh fluid hurts anything. Since fresh fluid will have its full additive package, it might even soften older seals, maybe not, but no way it hurts anything.
It is an old wives's tale from 20-30 years ago that you never put fresh fluid in old trannys. It was untrue then; its untrue now. As was said before, if new fluid ruins an old tranny--it was already shot before the fresh fluid was put in.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags