I took apart my t5 to replace 2nd gear. But thats not the problem lol. Everything was going back together just fine but..... I didnt mark the way they go back . My problem is the sleeve synchronizer for 3rd - 4th. I dont know which way it goes back. Every manual says to put it back the way u marked it, but what if you didnt mark it lol, then what? Its number 80 in the diagram. It has a factory mark on it, a X on one side.

 

http://www.hanlonmotorsports.com/t5-wc-lg.gif

HERES THE LINK..... #80

 

There is some links to pictures of sleeve..... Im just not sure which way it goes back, notice on picture has a side view, one side of sleeve has a slight slope to it unlike the other. there is a x on the other side, not side with slope