HPI's 2-Speed Transmission for the Nitro RS4 3. Has adjustable shift point for optimum performance on different tracks.
Provides more punch out of the corners, quicker acceleration, and higher top speeds.
Takes the place of the slipper clutch. This product includes one 18 tooth threaded pinion gear (for first gear)
One 22 tooth threaded pinion gear (for second gear)
One 43 tooth spur gear (for second gear)
One 47 tooth spur gear (for first gear)
One Gear shaft (5x55mm)
One Collar set
One Threaded 2 speed clutch bell
One 2 speed maintenance kit
One Pitch Bell set
One Clutch holder set
One gear adapter
Two Ball Bearings 5x10x4mm
Two C-clip 13mm
Three spring pins 1.5x8mm
One Binder head screw 3x8mm
Three washers 5x10x0.5mm (silver)
Two washers 7x12x0.8mm (black)
One set screw 4x4mm
One allem wrench 4mm
One spring .45x3x10mm



Never use a reversible speed control with a 2-Speed Transmission.  It will damage the one-way bearing.  Never Roll the car backwards or spin the wheels backwards.