Keep checking to make sure you got all the bolts some are long, some are short. There are two sizes. I literally just whacked it tons of times with a rubber mallet...and it just came apart.a little fissure formed and I whacked and pulled and it came apart. I'm looking at an old reduction case right now. There are 6 bolts

http://www.marlincrawler.com/tech/guide/dual-case-crawler-installer