I would like to put a slipper clutch or slipper spur gear on my direct drive Sprint 2. When a pebble gets stuck in the transmission, I don't want it to harm the motor. Can anyone help me convert my sprint 2 from direct drive to slipper clutch or slipper spur gear?

I have never seen a direct drive HPI Sprint 2...

Got any pictures?

Hmmmmm... Maybe I have my rc terms mixed up.

A direct drive would be something along the lines of what the Bolink Legends and the RJ Speed Legends use =



Not sure, but I think it's called a ball diff...

http://www.rjspeed.com/rjspeed/2010ex.pdf

Easiest way to keep pebbles out is:

A) Only drive on indoor tracks
B) Use a leaf blower & clear the area where you are going to play
C) Use a school tennis court that's been recently resurfaced but use the leaf blower also...

Out by where I live the shit heads tagged one HS tennis court so all in the area are now under lock & key so no one can use them...

OR you can...

I plan to go rally driving.

Pebbles in the belt are nearly unavoidable with basically stock transmission when rally driving.

Bump?

I happened to be thinking of this earlier today and came up with a half theory as long as you are about modding parts to work...

This is the composition of a slipper clutch:

This is the slipper clutch assembly for the Traxxas Grave Digger:

Here is a different one in a nitro truck:

In theory all you need is the appropriate gearing and mod a shaft to work with the mid shaft of the sprint 2 yet hold the slipper clutch assembly together while spacing the motor slightly deeper in the mount(would probably need cut and an adapter plate made). Or mate the slipper clutch to a modded pinion with an e-clip like in the installed pic.

Hmmmmm... So I just need to find a way to put a longer shaft in?

Seems that way but you ofcourse need to make sure you have the appropriate threading and spacing too. Spacing will probably be your biggest issue if you figure something out.