Gen 1's have wet brake in the rear diff.
They were pretty discreet with non-serviceable clutch pack. Can’t really tell from the diagrams. I still like Yamaha’s 4wd system though.The video mentions that some individual parts are not serviceable.
So maybe the clutch packs come with the new differential Case??
Maybe item 22? I'm not sure as I haven't had to dig into the front diff yet.
View attachment 86614
Edit: Item 24 is a friction plate.....
I may be crazy but I’ve been thinking my locker works better than ever on the transition since the last fluid change when I added the butter!MassiveOverkill says he has been running Gearbutter in the front end for thousands of miles successfully. Which is really good news because it is much better with gears and bearings. Especially with our sliding pinion gear that engages the four wheel lock.
You are not crazy. The front engagement has always been finicky to go in and out of. Sometimes you have to go into neutral and wait a minute for it to come back out. It works better with less friction.I may be crazy but I’ve been thinking my locker works better than ever on the transition since the last fluid change when I added the butter!