Ya if you get that you need to get this part too.

Part Number: HPIB046
[link=http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=411]http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=411[/link]


You can also use the 2 speed threaded steel clutch bell and the threaded gears.

2 Speed Threaded Steel Clutch Bell Part #: HPI86039
[link=http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=412]http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=412[/link]

Threaded Gear 22 Tooth part Number: HPI76982
[link=http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=413]http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=413[/link]

Threaded Gear 17 Tooth Part Number: HPI76977
[link=http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=415]http://allaboutfunhobbies.com/store/catalog/product_info.php?cPath=23_17_24&products_id=415[/link]