So my car today was driving perfectly fine, until the point where it randomly stayed stuck on first gear and didnt allow me to change to second gear. I parked my car and tried to move the shifter without breaking it and all but no luck, my car seem to be jammes in that gear and i cannot even move it back to neutral, any help would definitely help. I have a 13b n/a freshly rebuild, with a new clutch kit installed, and a few years old short shifter, all the liquids seem to be topped out so i dont know what it could be, has this happened to anyone else?

 

Can you shift it with the engine off?

 

take the transmission pan off, and using a flathead screwdriver or something similar, disengage the slider for that gear, manually from through the access where pan used to attach

I had this happen recently to my new dog-box transmission. It's really strange and rare, but there's a slider for 1-2, 3-4, and 5-R. Each slider has a detent spring which prevents you from selecting two sliders at once, like 1st and 3rd or 2nd and 4th. Sometimes with mishift, its possible for the detent spring to bounce the slider into gear while the stick is in neutral, then your car is stuck in gear as the stick and the slider are not in proper order. So you have to take the trans pan off and pop the slider off 1st gear.

I'm not sure else how to explain it but I hope thats the case!