Complete ball-differential set uses new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Features heat-treated and hardcoated aluminum output shafts, screw for external adjustment, tough composite 34T diff pulley with Labyrinth Dust Covers™, high-performance ball-bearings, high-quality carbide axial thrustbearing, heavy-duty diff washers, and carbide diff balls. Factory pre-assembled. 

Long output shaft for #305000 Alu Ball Differential made from new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Heat-treated and hardcoated. 

Short output shaft for #305000 Alu Ball Differential made from new special Swiss 7075 T6 aluminum which is 30% stronger than previous material. Heat-treated and hardcoated. 

Special screw for external diff adjustment. Manufactured exclusively by HUDY from world-renowned top-secret "Hudy Spring Steel". 

Precise nylon pulley (34T) and Labyrinth Dust Covers for ball-differential.

The pulley features XRAY invented and patented "Labyrinth Dust Covers", special anti-dust protective covers that are great for keeping dust and dirt out of the diff. Each pulley uses 12 diff balls. 

Two diff washers for ball-differentials. Each side of the washer has a distinct finish; a polished side against which the diff balls ride, and a rougher machined side that contacts the duraluminum diff output. Specially hardened to assure maximum life.  

New, innovation and new patent – the XRAY Multi-Diff™. This new unique front diff has three different settings: one-way / one-way solid / full-time solid axle.  

CNC-machined main axle for Multi-Diff™ for XRAY T1FK’05, T2, T2R and T2'007.
This axle does NOT fit the Multi-Diff™ for XRAY T1, T1Evo2, T1R, T1M, or T1FK. 

Multi-Diff™ locking axle is CNC-machined from Hudy Spring Steel™. Fits both #305102 and #305103 Multi-Diffs™ for all XRAY T1 cars. Must only be used with #305131 Inner Driveshaft Adapters. 

Precision-machined, specially-lightened outdrives for use with all XRAY T1 front one-way axles (including Multi-Diff™). The new lightweight one-way out drives manufactured from Hudy Spring Steel have a hex hole machined at each end.  

High-quality, lightened molded 34 teeth pulley with special "side click-covers" for front one-way differential. 

Set of shims for setting static wheelbase. Fits over rear lower pivot pins, servo saver, front one-way diff and other shims. 

M3x5 button-head machine screw, hex drive. Set of 10 pieces. 

Carbide balls 2.4mm for ball differential. Improved, smoother diff operation over standard steel diff balls.  

High-precision axial thrustbearing 3x8x3.5mm for ball differential features Tungsten Carbide balls.  

High-quality ball-bearings ID x OD x thickness (mm) = 5x8x2.5mm. Set of 2 pieces. 

Cone washer ID x OD x thickness = 3mm x 8mm x 0.5mm. Set of 10 pieces.  

8mm CH-clip. To ensure smoother, more precise operation of the XB2 and XB4 differential, the CH clips used inside the differential are manually ground. Set of 2. 

Rubber O-ring 1.5mm thick x 10mm dia. Set of 10 pieces. 

Polished chrome pin. Dia. x length = 2mm x 12mm. Set of 10 pieces.