In this video I take a look at installing a Tamiya 12 speed motor gearbox to drive the RC conversion of the Revell Liebherr A900C Litronic model. I also install a servo to actuate the dozer blade on the front of the model. Here is the latest RC Tractor Guy video RC Liebherr ...March 5, 2015 in RC Tractor Guy Videos tagged RC Tractor Guy Videos by RC Tractor Guy