for reference, here is what fine splines look like. might save someone some guessing and reading later on. took me a bit to figure out what i had and what i needed when i was doing this having never worked on one of these before. this all started as just fixing a few seals on the tranny while the engine was out.... then, its a bit slow into second, why not rebuild it... scope creep.... worked out though as I now have a low mileage, well shifting, 4 speed with no leaks! it did take 3 seals to get the back to finally seal up. another oops moment. these transmissions have two different rear seals which depends on if the shaft is fine or course splined. and of course i bough the parts for the old tranny and use them, the second seal, i didn't think about it and bough the same one and did it again, and the third seal i finally clued in.