Tamiya announced on their new TB-04 Pro chassis. The motor is now mounted near the left rear wheel and perpendicular to the drive shaft to effectively reduce torque steering, which has been a common drawback for most shaft driven chassis. Another change is the shorter dampers. They appear to have larger oil capacity but shorter travellength. The Caster Hub (C-hub) has also been changed from 4 degree to 6 degree caster and redesigned for functionality. The change is caster will yield better overall control and steering response. The new Tamiya TB-04 Pro is scheduled to be released in September of 2013. Body, battery, motor, RC mechanical, tire, wheel, etc. are not included with the kit.
Source: Tamiya TRF