i change my oil as soon as the light comes on which is about 27-2900 miles and tranny has been rebuilt and flushed out all i need to do is the front and rear end the t-case was done just a couple months ago and the motor sounds good for the most part so i think i should be ok.
Sounds like you are covered .
Just a question, how are you only going 27-2900 miles for an oil change?!?! Do you drive your truck hard?