mainace at 140 000

what type of mainace should be done to a car that has hit 140 000 miles? what needs to be replaced or soon to be replaced...?

Well, I'd take a look at the 60 tuneup, to get an idea of everything that needs to be checked over. If you havn't had your timing belt and water pump changed in the last 30k, I would do them.

Change gear oil in transaxle, transfer case, and rear diff if it hasn't been done since 100k

Check brakes, spark plugs, wires, keep up to date on oil changes, and use a synthetic higher mileage blend that strengthens seals.