I have a 2000 Blaster stock. The engine and everything runs fine, and neutral up to 3rd gear is fine, however when I try to shift to 4th, or anything above that, it wont move. Its like its ran into a wall and wont even budge up.

Curious on what you think is wrong, and how I should go about fixing it.

 

broken gear. time to tear it down

 

Sadly.... hes right, do you have much experience tearing motors/trannys apart?