Hey Sorry I have searched and cant seem to find anything like this.
I just put in a front one way diff in my sprint 2, ( the original got chewed up in a belt jam, and its nice and shiny and all. And it does only work in the forward direction, But when I hit the gas one wheel is getting more power than the other ( front two) and it causes the car to spin out.
is this diff adjustable?

I tossed out the paperwork that came with the diff and there is no manual online for it from HPi.
I didnt see any way to adjust it when i put it in. But its almost so bad I want to buy another stock one to put back in.

Any one else have this problem. also I replaced the rear with the hpi ball diff and it seems to work fine, its just the front that is uneven.

thanks
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Take it apart make sure its got enough lubricant inside of the housing

you should keep your paperwork for your chassis next time it helps

So Ifigured out the problem. It appears that the diff has 2 one way couplers and they are press fit into the diff housing.
( so they dont move) and one was as it should be the wheel only was let to move one way , but the other wheel was free wheeling, I took it apart and added some glue to the rotating side, and voila! it works the way it should have form day one.

I didnt know how that was supposed to be but after i saw how it should not have been that fixed my ride right up.

thanks HPi for not having any documentation online.

Dont diss hpi there site is still beta right now check hpi europes page they should have some documentation on what you need and dont worry everything on the sprint 2 is metric already so theres no difference from the hpi usa page and the hpi europes page

I had the exact same problem with my HPI one way - had to glue the bearing that was not pressed in tightly. Poor manufacturing and quality control. Second HPI product I had trouble with.

But I have to admit, their customer service was very helpful and responded quickly. I give them thumbs up in customer service.