I like Losi diffs a gazillion times more than AE diffs. Both are smooth when building them, but the Losi ones just keep on running smoothly. Maybe I'll post a diff building guide on here, but a lot of the 'tricks' I use are summed up in in the topic Lee Martin made:
http://www.trfracing.co.uk/page_1265187551237.html
A few things are very important:
- Sand your diff rings, I use #700 for it
- Use enough diff grease*
- Use the right grease: Schumacher or Much More for diff balls, AE Black Grease for thrust bearing
- When having a bad diff, check your thrust bearing first. Often the diff balls or plates aren't the problem.
- Adjust it by hand until it doesn't slip, then tighten it just a tiny bit more. Run it for 3-4 minutes and check it again. You may want to tighten it a bit more.
- Set up your slipper properly. Seems obvious, but a lot of people don't know the difference in sound between a slipping diff and a slipping slipper.
*Unlike some people say, An offroad diff really benefits from using a good amount of it. Only when you gearbox isn't sealed right, you are running a belt car or a 12th car you need to put a thin layer on the diff balls. I do it like this: take a small sack (like the ones spare parts come in), then put a lot of diff grease and the diff balls in it. Keep moving them through the grease until they all have a nice layer on them. Smear some extra grease in the diff ball holes, put the diff balls in and you are ready to go
It was pretty hard to avoid writing things like "smear the grease on your balls" etc.
