Leeky 1:23:1 Transmision

I was advised to come on over here and get doe advise from Eric about my
Transmission Wo's. So b4 I dove into this problem I did some looking around and found some usefull tips on leaky transmissions. I Thought I had traced the leek to the front main seal. So I removed the transmission and put a new from seal in. The shaft was in good condition and I took some 600.800.1000 and polished it and it looks like new. The area around the cover that holds the seal looked very wet so I was pretty confident tht the seal was the culprit. I cleaned the bildge and re installed the transmission and it looks like I have the leek back. I haven't even run the boat and I have a few drops. It feels like the leek is Comming from where the front section of the transmission bolts to the next section of the transmission. I can see a gasket between the 2 sections of transmission and I keep cleaning the trany and then trying to feel where the wet spot is under the trany. The wet area keeps comming up where the 2 sections meet. Is replacing is gasket a big deal or should I go for it? Would this be a good time to rebuild the trany ect. The boat is a 2002 Air. With around 320 hrs on it. It has the PCM 123.1 trany
Thank You

i would probably just do a re-seal on it, its not bad putting a front cover gasket on, the drain plug is also in that area, change the gaskets and seals and fill it with oil and set it on the bench over night

Grant,
The plug is a NPT thread. IE: tapered so, it gets tighter the more you crank it in. Yes on the Teflon!

Thanks for the advise

So you can see in my last Pic, that my drain plug looks to be some what stuck out or "Not flush" I took it out and checked the treads and they were great. I threaded it back in and it went in a-bit further. Then I took it out and applyed Teflon tape and it went in quite a bit further till it seemd to snug down. I put fluid back in it and now im gonna let it sit for a week and see if I have any leaks