Worried about the life of my transmission

What is your question?

I have a 2001 cruiser. I pruchased it with 92,000 miles. The previous owner took very good care of the vehicle. I have tried my best to do the same. It has been a great car, I love it! Other than the normal wear and tear you would get with an older vehicle I cant complain. Now I am up to 141,000 miles with the original tranny still. I myself have never replaced the transmission fluid. I am unsure if the previous owners did as well. I dont know if I should get the fluid changed this late into it's life without causing more trouble. I am just wondering if anyone has had any issues with the tranny? Should I or shouldnt I replace the fluid? My goal is try and keep it as long as possible up to 200,000+ miles..=) I own it free nd clear, great body still, nd with the ecomomy the way it is, it is the smart thing to do in my opinion. Please help me with any feedback that anyone can give. Thank you