i want to inspect the gears inside but i cant get the top off i took all the bolts out and tried to slide forward but there somthing keeping me from getting it completly off.
Yes, either in the tailshaft housing or under the shifter, there is a roll pin that holds the rev or fifth shift fork or something in. you have to tap it out to remove the shift rail. There are excellent t5 rebuild directions on the net somewhere also.
since you had to ask that i'm guessing you've never been into a t5 before, and there's nothing wrong with that (thats how you learn stuff), but i would definitely download the free t5 service manual, it will not only show you how to do things right so you don't have to order a rebuild kit to get new soft parts, but also make it a lot easier your first time around.
hissin should have the link to the t5 service manual IIRC, or you could do a search on t5 rebuild or something like that, the link has been posted up numerous times and should not be hard to find