diy flywheel/lfex plate
 

I just had head replaced at a shop and was told there were teeth missing on the flywheel. I'm seriously thinking about doing the job myself and was hoping someone had some advice. do you have to drop the trans or can it be slid back to replace the flywheel? also is there a post on the process? any help is app. thanks
2000 Saab 9-5 aero (b235r)

Is this car an auto or a manual?