The trans will work, you just need to get the proper mkIII mount. The pedal assembly will have to come from a mkIII though. I have a complete peddal cluster if you need it. $75 shipped and its yours. You will have to get mkIII mounts though if your car is infact the 98 gls. The axles are close in sizes but believe me you have to get the propper size for your application. Read through the entire thread and you will see everything you will need to know about the swap. I am sure we will all chime in if you have further questions.