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It depends on your frame, transmission mount and access. On my SPF I have to pull the tunnel cover off to gain access from above in order to remove the driveshaft and get at some of the bolts mounting the transmission to the bell housing. Which for my car means removing the seats as well.
as others have stated in prior threads and I have used myself, get either threaded rod or extra long bolts with their heads cut off. I have several different lengths that I use, up to 12" long. Take one bolt out at a time and replace it with a threaded rod/bolt with head cut off. When you are done you can then slide the transmission back out of the pilot bearing and clutch. Use this method to reinstall the transmission (reverse order).
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