van has over 330,000 miles on it & needs trans should I invest the money? on 2002 Dodge Grand Caravan

mechanic at shop says that he hears noises in the engine and it has a oil gasket leak. He thinks I should not put the money into it b/c of the mileage and other things might go wrong with the van that old with that amount of miles on it.

Asked by for the 2002 Dodge Grand Caravan
What engine do you have? Find another mechanic. supposedly hearing noises and "has a oil gasket leak" is not a very good assessment of your vehicle.
Have you done the proper preventive maintenance on the van?
You need a trans why?