It will be worth it, trust me....you will notice a difference

You are so right scjrss, the 8th scale diff in the ERevo is so efficient, tough and so tunable. According to my my calculations, the center of the hole in the shafts are 0.229'' from the tip.

Mc, any updates on the aluminum slipper disk?

yep! I'm still running the same disk I made, it wore down by about 1/2 of a millimeter. I had to readjust it a couple times when it started slipping too much. It is still working awsome and I love it.
remember that Losi center diff I made with the three aluminum posts, I plugged two of the holes in the diff cap with JB Weld and made a new hole to install the TRA3985X output gear with only two posts like the last CDs I made. Now I have two CDs made with the heavy duty Losi LST XXL diffs. I will see if the JB Weld plugs hold up. I have been running this last Losi heavy duty CD with the two aluminum posts and TRA3985X output gear every day since I made it and it's working really really well. I'm happy about it.

thats great news, hopefully everything will continue to hold up well. Mine is still holding on strong, and no leakage that i can tell, but after the summer ends, im due for a complete teardown anyways

Just need to contact a machine shop now to have them do the drilling and tapping. Once that's done I'll drill the two holes in the plastic spur and assemble it all. Slid the shafts into the spur/case just to test alignment and everything lines up perfectly. I bored out the center of the plastic spur and then also counter-bored a larger section to allow the metal cap to sit flush on the spur.

http://i47.photobucket.com/albums/f1...3/P1020356.jpg

http://i47.photobucket.com/albums/f1...3/P1020352.jpg

Lookin Good Jason !!!!
For a realive newcomer to the Hobby your jumping in with both feet, Great job Bro !

I used a lotta jb weld on mine. I had my friend mill out the weld for placement of an internal bearing inside the case. It is ultra sturdy and i've bashed the crap outta this thing and it's still hella strong never had to rebuild it at all except to put in 500k oil:

If I use an 8x12 bearing on the diff cup side and a 6x12 on the spur side it should fit in the stock trans case without any mods right? (except a little shimming)

Urgeoner did you use the JB Weld so you could have a larger bearing?

I wanted to use the bearing that fits around the steel end of the diff case so yes. I shimmed a bit much initially and it wasnt that strong so I JB'd it up.
I also used a bit of the 3/4" black plastic spacer found on the regular fixed output shaft. You can see it in the first picture, it helps with the end play by further reinforcing the output shaft.

SC, thats correct, use the 8X12 on the diff cup side, and into the tranny case, and use the 6x12 on the gear side and use a few shimms to take up any play between the gear and the bearing, and you should be all set. This was originally set up to be a easy design for anyone to be able to make a 1/8 Cd for the erevo tranny. What is everyone's input on this..... Did I manage to make it simple enough, with the exception of drilling & tapping the ring gear, and the 2 holes for the output shafts? Let me know....

I'm not very experienced in the workshop but it's been smooth sailing so far (with the help of all you guys of course). I'd say the reason I'm not doing the drilling/tapping myself is half lack of experience and half lack of proper tools. If I had access to all the tools a machine shop has I'd probably give it a shot myself.

I'm a little more comfortable with the idea of drilling the shaft pin holes, but since I'm going to use a machine shop for the hardened cap I might as well let them drill those too, since they can better ensure a dead-center hole. Also, costwise it will probably be the same, since it's such a small job and they'll probably have a min charge of 1-2 hrs labor which should be plenty of time to do the work.

I think it would be good to start a new "official" Revo hybrid center diff thread that could even get stickied. Right now there's lots of info floating around, but it's scattered through many different threads. We should work on a new write-up and bring everything together into one.

I agree, all the info would be nice if it was organized into a single thread & stickied as well, that way a person can find the info easier and build one themselves. Also a big thanks to MC for his ideas and improvements as well. Fortunately for me I was able to have a friend, who works in the machine shop where I work , and he was able to drill & tap the holes for me, and I was able to do the holes in the shafts myself

+1 :yes:

I started a official thread for the info, let me know here if i missed anything, and I'll add it to it...Hope i got it all and that it is helpful to everyone as well