How soon should you replace the MT trans fluid with something like GM syncromesh FM? 500 miles? 1000 miles? Doesn't matter? I didn't think there was a special break in fluid for the tranny so can you just swap it out right away on a new car?

 

someone done it at 300 miles or something around there so i think you can do it whenever. i did it with my first oil change at 3000.