Can someone help me please, need to know if you can remove the rear main shaft without removing the rear bearing first? . Don't have a bearing puller, just want to replace the synchronizer blocker rings. Thought about removing the front bearing with 4th gear first, then removing the snap ring on the main shaft, and removing one drive gear at time. Then take out the main shaft from the top opening.. Can this be done, or I need get a bearing separator ? any help is appreciated.