I went with 3k and loved not sure on dirt you may want a little less but 3k is a good place to start

Ran mine tonight on a medium traction outdoor track. Started with 1k oil and it wasn't very good. Wouldn't hook up. Went to 10k and it was dialed. Let my buddy drive it and he immediately ordered a gear diff fir his 22. Super easy to drive with great corner speed and forward bite. Did have to loosen my slipper up from the ball diff setting due to less slippage.

Ya I absolutley love the car now I can't see why losi went with the ball diff when the gear diff is so smooth.

I only wanted to do this cause my dex410 worked so well and it is gear diffed and as far as I know the dex210 will be too.

Plus so much less maintenance and other than some shims its a direct drop in.

Btw for shims I used hpiz892 if anyone is wondering.

This is very interesting indeed. Given the different tooth count did you have to change the spur/pinion you were using before?

The change is so small I didn't notice any difference.

I didn't change my gearing. Would be like adding 1.5 teeth to the spur.

Thanks for the responses, this is great news indeed. Too good not to try!

Just make sure you reset your slipper. You will either wheelie over backwards or not hook up if you don't. It's pretty eye opening how much slip a ball diff has even when tight compared to a gear diff. I had to back mine out at least a full turn and could still lift the front tires slightly under acceleration.

Thanks for the advice. Just to reconfirm, I already ordered AE P/N ASC9827 to build the diff, and based on what I'm reading here the same bearings I have on the ball diff can be used with this AE diff given that they are also metric? Finally, the only other item if needed would be shims correct?

Correct.

A few questions:

What weight oil is in the diff stock (or is it the black grease)? I got one off ebay from a B4.1 RTR.

I believe you guys about the diff oil wieght, but looking back into threads, I thought many sc10 drivers thought 1k was too thick. They were going with 20w shock oil or black grease. 10K for outdoor and 3k for indoor seems thick in comparison.

How full are you filling yours. In 8th scale, I used to fill to the cross pins, to leave room for expansion due to heat. I know you can overfill them.

We are mixing 5w motor oil and 20 wt shock oil, diff half full. Works great

I filled mine to the middle of the cross pins. Just like setups you can't go by what works for someone else. It's going to take some testing to figure out what works for your track and driving style. I tried what I thought would be the two extremes in 1k and 10k and found 10k was better. I might go even heavier next time I race to see how I like it.

Isn't 10K essentially "locking" it? My experience is only from 1/8 scale (Losi 8ight), so I hope the assumptions are still the same (ie; thicker oil = less cornering traction but less wheelspin whereas thinner oil = more cornering traction)

I'll do the same, I have 1K,2K and 10K oils that I use fort he 8ight. The track I run on is indoor clay, medium traction.

The gears are smaller in this diff so 10k doesn't feel as locked as it does in an 1/8 diff. It will take a battery or two to break in the diff so don't go by how it feels when you first build it. It will loosen up a little.