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I did this on my 2001 earlier this year (turns out it was just a goofy hose). It's not too difficult. If you get the right tools, disconnecting the trans cooler lines isn't too tough. But do keep in mind that if trans fluid doesn't pour out after disconnecting the lines, it could still pour out later, so keep something underneath it to catch any fluids.
Spend the extra $1-$2 and buy the quick disconnect tool for the lines. I learned the hard way by trying to use a homemade tool and screwed something up. Also, inspect your radiator for damage before you get started.