Transmission fluid

Thanks ed92626! I have heard that if the fluid hasn’t been changed it can ruin the transmission? Is there truth in this? Kind of concerned!

Thanks Ed92626 The fluid is still red in color with no burnt smell to it transmission is smooth but shifts a little hard between gears. I also have an issue on the highway when I accelerate into passing gear the revs will increase no problem but acceleration is slow to increase.but if I accelerate without passing gear the speed will increase past 80 or 90 no problem. I do have a bad o2 sensor bank 1 sensor 2. Do you think the o2 sensor could be causing this problem? I have new plugs and air filter I installed wondering if transmission fluid could cause this or o2 sensor??

Thanks again ed92626 really appreciate the help!