Update: I talked to seller and I made the wrong conclusion. The transmission was not swapped. It came with a 6 speed manual transmission. I didn’t know that was an option in 2005. Anyway, the current issue in his opinion is the shifter. It’s currently stuck in 2nd gear. He had driven fine for a few months without issues. It’s just recently that he would downshift into 2nd gear, release the clutch, and it would do nothing. Now, no matter what gear he tries (even neutral) it’s in 2nd gear. He’s convinced it’s not the transmission. When he looked closer at the shifter, it appeared to have some give to it. Thoughts? Anyone have a similar issue?

 

Well it could be the shifter cables have just become disconnected in the engine bay, just on the top of the gearbox. However it could be a number of things including the gearbox and realistically that's not possible to diagnose over the internet.