Transmission Fluid Suggestion

I bought my Tacoma last year in May and never thought about changing the Transmission Fluid. Now that it's been about a year and a half, I thought that I should change it since I don't when it was changed last. What kind of Fluid do you guys recommend? I have no clue because I've never had to do it myself. Thanks guys!

 

Is it manual or auto?

 

Sorry, I should've mentioned that in there. It's a MANUAL Transmission.

 

Amsoil or redline. I've ran the redline product before and I've been happy. I'm going to try the amsoil oil soon just to see what thats like, but I've ran the redline before and can say it's a great product.

Don't be too frightened by the price. The service interval increases with these higher quality oils. Also according to your profile you have an 05. Has the oil been changed before? IF not, maybe put something cheap in there for a couple months just to clean things out a bit.

 

I'm changing the oil right now as a matter of fact. Mobil 1 Full Sythetic High Mileage.