Rear Differential Help Needed.

[Winger]

Is there an app for Droid phones that would log the speed so i could check it?

Yes

http://androidforums.com/incredible-support-troubleshooting/108129-gps-mph.html

I got 25mph out of the RC10 and 26mph out of the HPI...I would have never expected these numbers. I suppose the Rear DIff isn't too bad off.

Here is the RC10:

[Winger]

I did order 6625s and 6626s just to see if it smooths the rear diff out.

EDIT: No luck with these new parts.... I am thinking it is supposed to be this way.