No it works I've seen it an got the info I need I will try it out and report back.

yea it works good that's what i did to mine. it was way smoother then a ball diff. gave me more steering if your not big on a ball diff's it's the way to go. i think a gear diff easy and cheaper to maintain then ball diff's.

Is it a direct drop in?


I just ordered mine off ebay for $20 shipped. Will give it a try. I only race once or twice a year. Drive on tracks weekly, just don't get a chance to race.

yea just put it like it's a ball diff you might need some small shims but that's it.my buddy did in his.i didn't need them.

http://www.amainhobbies.com/product_...r-Differential

This is the gear diff y'all are referring to?

Thats the one just had to put some shims on each side 10mm inner dia and 15mm outer dia you may not have to but there was some play from side to side and the shims took that away.

using 3K fluid and seems great gonna run it for a couple weeks and then take it apart and inspect it but so far so good

That's exactly the reference you need
I have one in my 22 since 10 packs, and I love it with 3000 silicon oil in (just be sure to put some lithium grease on the o-ring and paper to seal it

You just need about 0,7 or 0,8mm shim each side of the diff.

My favorite track is an astro one, that was very hard to my ball diff. I am more than happy with the gear diff !

And there were no problems due to the different tooth count?

Is the gear diff only ideal for high traction tracks? I run on a medium traction indoor track and just wondering if the gear diff would benefit me.

I run with my gear diff on our high traction surface when it is dry, but after a rainy afternoo, I can tell you that it was a very low traction surface

The car was really usable andhealthy with the diff gear. YOu should have a try, the Asso diff is around 20$... you may use 1000 or 2000 oil on medium traction surface.

No issue for more than 10 packs, the transmission is veryyyy smooth !

I checked my diff and gears after each afternoon, and no issue at all

I installed my B4.1 gear diff in the spare 22 transmission. Mine fit fine, no shims required. The gear diff does have a slight high spot, but should wear in fine after a couple packs.

Thought the same thing when I installed mine, but that's because the ae diff is tight on the bearings and I didn't feel the slop. When I pushed the diff side to side it moved quite a bit. Had to use some shims to tighten it up. Also gear mesh was a little tight but broke in after a pack and is nice and smooth.

Just raced with this setup tonight and WOW awesome so much better on Carpet.

I will be trying this on an outdoor track, little bit slick. Any thoughts on diff fluid? I was thinking of just starting with 3K, like they are for the carpet. I don't race, just thinking that this might be a little less maintenance than the ball diff.