w/ 70K miles, servcing it won't create leaks. I'd suggest you take it toyota and get it FLUSHED. Don't do the quick drain&fill for 70K miles. NOT worth doing just that. If your taking it to a local shop, i'd suggest you can also have them flush it and replace the fluids with redline or Prestone Synchromesh (its superb for trannies). with only 70K miles...man that cressida has a LONG life ahead!