2011 Frontier V6. Just turned 100K mi. The transmissions has always shifted great, but per recommendations I decided to do a transmission drain and fill. I pulled the dipstick for the first time ever just to check the condition of the existing fluid before I drained it, and I was shocked to see that the existing fluid was completely clear. No hint that the engine had ever been started. At first I thought the level was low and there was nothing on the dipstick, but then I realized it was indeed full, just crystal clear. My first question is: is Nissan transmission fluid clear out of the bottle? (every other transmission fluid I have ever seen has some tint to it, even when fresh out of the bottle). If not, why is mine? Question 2: should I change the fluid anyway? Sure seems that if I'm not having any issues, and the fluid is clear, why bother. What say you, sages of the Frontier world?