Asso 12L4
 

Hi guys iam new th the 12 scene and was just wondering how often you rebuild your diffs on the 12L4, it is just after about 16mins i find the ball diff becomes very gritty so much so if feels like the balls in the diff have squared! I have check the diff
re-built it and it seems fine but again after 16mins or so it become very gritty again.

any help is appreciated

Brett

Brett- Kimbrough makes shields that fit onto thier spur gears that helps to keep dirt and carpet fibers out of your diff. They are really cheap and just snap on. I used to have to clean it every race day or it would feel just as you described. Also use very little diff lube just enough to coat the balls all the excess just attracts dirt. I only have to clean them every other week now.

Here is a link they are under accessories.

http://www.kimbrough-products.com/

Thanks for your help:D

they dont have a very good pic on thier site here is a better one.

Brett W. - Have you replaced the outer bearing when you cleaned your differential? Sometimes that bearing should be replaced. It is a small bearing that wasn't designed for this application. It can be damaged easily when the wheel on that side contacts the wall.

whats the deal with these big ring diffs? i have a carpet knife v3 and i assume it has the standard on on because the balls are in the spur gear inner holes... what advantages do the big rings have and why dont any cars come with it as standard?

The reason most dont come with it is cost. The big ring diff uses 12 balls instead of only 6. So it not only spreads the load out wider it sreads it over twice as many bearings. They are super smooth compared to the regular diff. It seemed to me when I switched over I could adjust the diff a little looser also. Thats probably why it feels so smooth. I know the CEFX car comes with big ring diff. Others may also.

BTW someone was just trying to sell one on the for sale forum for only like 35 bucks new.

Back in the day, all diffs were big ring diffs. AE introduced the "stealth" diff with the 12L3. The idea was to reduce rotating weight. The downside is that the smaller rings are more fragile and with fewer balls, the diff is not as smooth. A smooth diff is crucial in a 1/12 scale car.

D.P.

Reflex 12
 

Anyone run a Reflex 12 ? Any building\setup tips or tricks to share ?

Oh yea...has anyone had an issue with a loose ride height adjuster fit in the rear pod ? The motor side one on mine is very sloppy, have tried other adjusters thinking I had a bad one but turns out this is not the case.

pucho

your right John will bring his 1/12th scale i am going to run oval this weekend so maybe next Friday we can run 1/12th scale

Any one used Calandra new 3.2R yet?

I personally would go with the cefx it is asome!!

I like how you put that: "the wheel contacts the wall" :D

Thanks, Elvo. Women like my humor as well.