RC8B4 Differential Gear Set, 20mm HTC Bearings 6mm hole in the rear

6mm hole in the rear pistons

while the larger diameter hole allows for smoother diff action without the thrust dragging on the diff screw

Screw list:

rear tower(4)

RC8B4 Differential Gear Set, 20mm HTC Bearings 6mm hole in the rearPart Number: ASC81380 These are the OG 20mm HTC gears for maximum drag, hot weather, European racing. HTC gearing with 20mm Sun Gear for locking diff Schelle red o rings for diff recommended Typical shimming is pumpkins 22. 95 and over use the 4 planet shims. 22. 90 and under use none. Fits: RC8B4. 1, RC8B4. 1e, RC8T4 and T4e. Recommended: High Grip European tracks, no dust, no bumps Oil Tips. front and rear, ebuggy and nitro: 7 front 4 rear low grip.