It also included new gray colored parts and redesigned bulkheads and differential housings .
The T - Maxx 2.5 R featured Traxxas ' TRX 2.5 R nitro engine , a new driveline similar to the Revo 's , with the Torque - Control slipper clutch on the spur gear .
Traxxas also included new gray colored parts and redesigned bulkheads and differential housings .
The T - Maxx 2.5 R featured Traxxas ' TRX 2.5 R nitro engine , a new driveline similar to the Revo 's , with the Torque - Control slipper clutch on the spur gear .