SSD have recently released both front a rear complete axle sets based on the Axial AR44s.
Front axles features:-
Scale design and assembly
Injection molded nylon main housing
Removable diff cover
Metal bearing holders
Removable heavy metal axle tubes
CNC machined aluminum C hubs (SSD00145)
CNC machined aluminum knuckles (SSD00144)
CNC machined aluminum link mounts (SSD00159)
CNC machined hardened steel locker (SSD00196)
CNC machined hardened steel gears, 8T/30T ratio same as stock SCX10 II (SSD00181)
CNC machined hardened steel CVD axle shafts (SSD00219)
Same size as stock SCX10 II AR44 axle
Same link mount locations as stock SCX10 II axle
Direct fit onto SCX10 II chassis
And the rear:-
Full details at the SSD Website