Originally Posted by rc-zombies
old gears had a thin back plate...thus resulting in gear strippage.
new gears are thicker and the one-way gear has an aluminum back plate to go with it... if you do not have them..contact HPI customer service and tell them you have an old kit with older gears...and they will send you out the new gears and backplate for free... if you're lucky..sometime they will send you some extra HPI / Pro4 decals as well....
They won't do it any more!
I just called to see If they would replace mine and they told me They were out of stock
And didn't do that any more...