Be carefull when pulling the two housings apart, because the front part of the input shaft will want to come off if you are not careful, and the baffle could easily be broken (the baffle is between the two sections and holds fluid on the bearing), sometimes it stays on the mainshaft and is not broken, other times it stays in the input shaft and the plastic part is broken and ruined. Just try not to remove the input shaft from the main shaft if possible. You would be required to remove the front bearing to replace it if you ruin it.
Once you get the trans apart you are going to need to remove the rear bearing to get the gears off to get to the Reverse Gear to find the problem. I had to use a bearing puller and a torch to heat it to get it off, without the proper attachment the bearing will be ruined, a new one is $40 (I had to buy one) mine did not want to budge even with a lot of heat it took more heat that I thought was safe and the bearing turned colors but came loose, I did not feel safe in reusing it. The new one goes on very easy if you stick it in the oven for 12-15 minutes at 300 degrees. If you need anymore help I can let you know the rest of the process. I thought mine was a synchro problem too but as I said, it was the gear itself and the slider assembly.
