I completed the same mod to the diff cases and I found it easier to accomplish after creating a "grind stop" out of a couple of washers (1.5mm total thickness). This helped to provide some consistency to process. Mounted to my Dremel Drill press, I used a thin cutoff wheel to get it roughly where I needed it and then sanded it down with a fine sanding wheel. As Mantis suggested, I used the original idler bearings from the kit and replaced them with the caged ones I had ordered from Avid. Nothing else I've done to help improve the dif wobble situation has worked nearly as well.

It is a bit of a PIA but it's well worth the trouble. One thing to keep in mind though is that if you are using an old set of outdrives the amount you may need to shim afterward will vary. The used ones will likely need more shims due to the malformation of the hole the pin goes into when you mount the outdrive back in the diff.

I also added an additional paper seal when I put it back together and there has been no leaking and very little wobble.

The diff gears need replacing, the teeth are wearing down. You might get away with shimming them for a while but think about buying some new gears. If you do some looking around you can get a whole diff for $21.00 on e/bay
http://www.ebay.com/itm/330628606762...84.m1423.l2649

Is the cause worn diff gears or wobbly outdrives causing the gears to not mesh properly?

This is the body i ran at the RCP finals, didnt make much of a difference. how much did your Losi weigh? I cant be too far from it at 6lbs9oz
right?

I honestly don't know what it weighed, I did not weigh it and it's in pieces now being cleaned up to sell.

According to the Googles, the SCTE is 6.75lbs as a roller (no electronics or wheels).

So that's quite a bit heavier, I'd guess it's upwards of 8lbs fully loaded.

WOW!!! i had no idea they were that heavy, basically the same as an E buggy, well no wonder they jump as they do. Maybe i need to machine some lead today

Yep.

I knew it was a lot heavier, it weighed more as a roller than my SC10 did complete. I could tell just moving one from the bench to the floor when I was swapping electronics.

I'm going to add quite a bit of weight to the center of the chassis after I corner balance it. I may really try and get it over 7lbs. We shall see.

Remember though, this is for the bigger outdoor stuff, I don't get to race much on small/tight 1/10th indoor clay (although I wish I did).

From: http://losi.com/Products/Features.aspx?ProdID=LOSB0127

Thanks Slots It was so frustrating I was about to sell it! I will replace the entire diff and gears and see if that solves if so I'm keeping it!

What you raced on last week is what i race on every week, so i have to figure out something. All of the tracks around here are pretty much the same except Mikes is smoother .

Right. Well you know I contend in both RCPro series, so you know all I'm racing on is big tracks outside of the Shortcourse Showdown.

I'm gonna try and figure out some sort of a weight kit I can add or remove.

yeah...zip tie some weights to the f/r shock towers and pull it when we run on baby tracks

Mantis, do you think its possible to assume that the elimination of chassis flex has compunded the bad flyability and pitch control displayed in the air on extreme jumps for this truck?

Its not just my truck and its not just my setup. Flex is not going to effect anything once you are in the air. Only thing moving once airborn besides the truck as a whole, is the drivetrain.

Flex isn't a bad thing. Too stiff a truck will hammer and bounce all over the place.

I don't think any of the jumping problems with the SC10 are chassis-related really.

I'm starting to think it's simply inertia (weight) vs. parachute effect (lift).

Makes sense with all the comments about how it drives without the body.

The SCTE feels pretty close to the same with or without the body except in really strong winds.

I understand, and never said it was just your truck or setup, I read the posts about a few of our trucks that couldn't make that big jump consistently. When I said "this truck" I was reffering to all sc10 4x4's, as in our truck and manufacturer, not just yours Mantis.

Regardless, don't want to beat a dead horse as it sounds like you are fed up on this subject. Don't blame you though, as your initial post on that experience opened pandoras box. Be easy!