You are correct. I can’t remember if any of the ones I have are a 5000 series, but the 7000 in my 300d is the same way. I also have a leak in probably the same spot as you did and also agree it’s not worth the complete tear down for the once a year I run the machine to keep it “fresh.” I just keep a rag under the transmission and check the level before every run. Personally, I don’t mind a little fluid in the bottom of the tub..:it’s all the less likely that dirt and grime will adhere to the tub and keep it looking brand new after my “restoration.” Eventually I plan on building another one of my first gen machines and will be doing a tear down and rebuild of a 7000 for that machine. Fingers crossed it goes well.
#1 Attex ST/300/D - "The Duck." Restoration of my family owned aatv from the early 1970's.
#2 Attex ST/300/D - Resto/Mod project for the trails
#3 Attex 440 Thunderchief Racer
#4 Attex ST/400 Trail Machine