What are you using, and wher can you get them?

I've had problems with the center diff. leaking between the diff. housing and the spur gear. I sanded the diff. housing as always and have still had them leak just sitting in my tool box. I have narrowed the problem down to the plastic spur gear. The sealing surface where the diff. housing meets the spur is not perfectly flat. If you look at the areas on the spur where the screws pass thru you will see that they are raised up around the holes. It only makes sense if the diff. housing needs to be sanded flat then so does the spur gear. Before I continue let me just say that I tried all of the suggested remedies (grease, doubled up gaskets, different spur) to mention a few, but they still would leak. I was getting pretty frustrated because I've built plenty of diffs. for my RC8T truggy and never had these problems but they had steel spur gear on the center diff.
I had an old diff housing that the screw holes where getting stripped out that I knew I would'nt be useing. Placed the diff. housing lightly in a drill press (you can use any type of drill) on the metal part where the outdrive goes thru, I then placed some 180 grit lapping compound (1:1 car guys will no what lapping compound is) on the area where the spur and diff. housing meet, held them together and gave it light spin with the drill for 15-20 sec. Clean of the compound to check the progress and repeat until the spur mateing area was flat. Depending on how much material you take off it may be necessary to remove a shim to get a smooth diff. Worked for me!

Are there no gaskets we could employ to solve this problem? Seems like a cheap / easy way to get a good seal. It would require a little extra shimming I guess .. just surprised there's no gasket in there to begin with.

I just got a used RC8Be to get started so please forgive my greenness if I say anything stupid, my first buggy.

Guys, I have a question regarding the caster adjusters, blue/red ones. I can only read 2 of them, one says 1601 and 1602. Which ones are you supposed to use to get the correct caster? The markings are hard to read and I bent a hinge pin cause I installed the wrong set im guessing. Any help appreciated

Buggy turned up today..
Let the build begin..

nice man, wish i could afford to get a brand new kit.

Thanks for all the input on the diff problems!

I did not understand the method of "reeltech" though?

Is anybody in contact with Team Associated or are there reading here too- may be a solution is on the way already?

Could you please tell me, how do you clean the silicone off the chassis?

Thanks!

BTW: I am 99,9% sure having used all the o-rings at the correct location and also the black grease, screws are not overtightened, the gasket is not damaged, the diffs are not overfilled.

If you over tighten a plastic spur it will warp and not be "true" any more and leak.

Doubling up the gaskets helps that a lot.

I don't have a problem with mine leaking and I'm just running one gasket still. If you find that you have an excessively warped spur gear, I'd call AE customer support, they will take care of you.

Heavyjeffd, Both spurs were NIB. Its possible I had a bad batch of them.

What is "NIB"?

New In Box !!!!

Has anyone here tride out the Team Durango DNX 408 wing on the RC8.2 mount ???? Will it fit ??

This may sound like a dumb question but when yall say "grease the outdrive" yall just coat the outdrive in grease right? This doesnt affect the diff oil? Does it help with leaking to put grease on the ring gear where it meets the cup? Does it matter what "grit" sand paper I use for sanding the cup? I am gonna try all the tricks to help with diff leaking this next rebuild and want to make sure I do it right.

Greasing the outdrive means putting AE Black Grease on the small o-ring on the outdrive. It doesn't take much - just enough to cover the o-ring and fill the tiny gap between the o-ring and the step that's machined into the outdrive where the o-ring goes.

Use fine grit sandpaper. I think I use 330 grit.

Grease the shaft of the outdrive that goes through the spur gear or diff cup. This does 2 things. It reduces wear as the out drive rotates in the hole by lubricating and reducing friction, and the grease also creates a bit of a seal helping prevent leakage. If you are not doing it already you should grease all of the o-rings and the slots that the o rings sit in also. Do the large ones too, not just the tiny ones on the shaft. Don't worry about a little grease getting in the diff oil. It wont hurt anything.