With that amount of miles, a full rebuild is the only realistic option given you are going to keep car any length of time.

There is no way I'd make such a repair under these parameters for an unknown / untrusted customer as it inevitably results in: " You just ( 8 years / 90,000 miles ago ) charged me $ 2,000 ( $ 800 ) for a new transmission ( patch up repair as stated on the work order. ) and it want it fixed under the lifetime warranty. ( 90 day warranty as stated on work order. )