[Sisyphus58]

I have a question. I have a 2003 spyder gts Convertable with a bad transmission but car is in excellent shape structure wise. I also have a 2004 spyder gt convertable with a goof transmission. Are these interchangeable?

Yes, the GT and GTS transaxles are interchangeable and either one will bolt on the 6G72 engine, but they have different gear ratios on some of the gears(1,2,5), with the GTS having slightly more torque.

 

[Sisyphus58]

If you use your existing 03 ECU along with your existing 03 distributor, you should be fine, assuming the ECU was reflashed for the manual tranny swap.