Yes your correct that what I was calling a seal is the oil baffle, if that's missing or shredded it can cause failure of the pocket bearing.
If the input oil scoop is missing or damaged the input shaft bearing will be poorly lubricated and the pocket bearing will get little to no oil at all. This is located behind the front bearing race between the race and quill, make sure it's there and not damaged. You can see it in this pic.
Also how does 3rd and reverse synchro's look? They are the first to go bad usually and you can get reverse poping out and third can "crunch" when going in.
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