I thought the reason for sanding diff rings was to not only insure they are flat, but to promote the diff balls rolling on the rings as opposed to them sliding across the rings which we all know will cause flat spots on the balls.

I have come to believe a stock diff can be just as smooth and last just as long as any after market kit. It all depends on how well it was built, and taking the time breaking it in properly. I learned that lesson after rebuilding my 22 diff about 22 times.

The diff balls need to grip the diff ring to work efficiently.if the diff rings are not sanded, the diff will slip and therefore be less efficient. Roughen the diff rings with sandpaper to create more grip for the diff balls. What you were saying about the area on the ring keeping contact with balls is false. If the ring is at all polished, the balls will slip, which will make you tighten the diff more. And when the Balls have something to grip earlier, you will have a looser diff with the same results. There has been much research about this, and sanded diff rings result in the best outcome.

What kind of shock packages is everybody running?

400 grit sanded rings

Fr
1.6 piston 30
Kyosho White

R
1.6 Piston 27.5
Kyosho Gold

= Good

22 times good one LOL. A stock diff has scuffs and pours. A sanded diff correctly sanded in a figure 8 motion will work pretty good for a short time. But it will be more porous and thinner.

If you polish them to the point of being a glass or mirror finish you will get slippage. But it can be done if you break it in right. But you sacrifice making the surface less flat and making it thinner. Polishing is good lightly to make the ring debris free after sanding them. Cleaning is good enough but there will be more pours with a fine metal dust. I have had sanded diffs with thick gunky black grease after running them from not cleaning them good enough before building them. I have always used 800 grit, could be that reason? Most fellas use 600 to my knowledge.

I will say this sanding diffs has not been practiced near as long as diffs have been working with out sanding them. Would I polish a diff? No. At least not to a smooth non porous finish. I have tried I think every method ever talked about or seen at the track. Even gluing the ring to the out drive.
In the end to each his own but I am sticking with the non sanded stock ring method. I have had the best success this way.

I think its better and many disagree. Believe me we go threw this at the track often... Grrr!

But I don't think false is quite right, but I am not the wizard by far.

Thanks!

Anybody running the AE springs yet?

Thanks, I will give it a shot

I wish. I am waiting for them all to be in stock so I can buy a full set. For now I am running the Kyosho springs as stated above.

Is anybody having problems with their BB's leaking with AE orings or is everybody running Kyosho.

No leaking for me. Make sure you have the white spacers in correctly and used slime on the rings.

I have the K-rings but haven't installed them yet. I was told by a team driver that they swell more than the stock rings, even with slime, so I haven't tried them yet. The middle spacer would have to be shaved a little bit to compensate, but I didn't want to risk leaking when they weren't swollen.

Me. I love my ae springs, much better than the losi springs. They very well rival the kyosho springs. I run the 3.15 Green front, 2.1 White rear. Will try the 2.2 Gray rear as soon as I can get them. I run on a very smooth tight track, wet slightly grooved.

Front:
1.6
32.5wt
Green 3.15

Rear:
1.6
30wt
White 2.10

I'm running the AE Green Front and White Rear springs with 30/27.5 oil and 1.6 pistons all the way around and my car is dialed!

I picked up the B-Fast diff rebuild kit and the rings look dope!

Only leaky BB shock's I have seen were @ the K mart .

look for um under that blue flashing lite......


Diff's ...

Ae polishes for a reason I believe....

Start out with a smoother surface ?

You end up with a smoother diff .....


Think?
Sanding by hand is a guess at best
only makes for a thinner ring and more so on some the edges then the rest of ring .

After your awesome efforts you only end up with a scratch up surfaced for the balls to press their groove into the rings....

Nobody would happen to have a set of green fronts and white rears laying around they could sell me?