This is a Pre-Built PRO-Series 32P Transmission for the Slash 2wd and Electric Stampede 2wd. Pro-Line is finally ready to release the highly anticipated follow up to the original Pro-Line Performance Transmission: the new PRO-Series 32P Transmission! Pro-Line engineers made sure to carry over all the things from the original that made it the most popular and loved upgrade to your Slash 2wd while making it even stronger and more capable of handling today's extreme power systems. Whether you are racing or bashing, this Transmission is destined to become the ultimate performance upgrade for your truck!