Start About IM Transmission Gearboxes Replacement gearboxes Power take-off Oils IM customizations ETC insurance Allison Service PTO Calculation in English PTO Positions in English Contact Us About personal data Code of Conduct Did you know that... Did you know that Allison is the world's largest manufacturer of automatic gearboxes for heavy vehicles. Feel free to read more about Allison on Allison's own website. » To Allison's website Environmental policy IM Transmission works to ensure that our operations have the least possible impact on our local and global environment. " Read more here Welcome to IM Transmission Allison is the world's largest manufacturer of automatic transmissions for heavy vehicles. Chelsea is a world-leading manufacturer of power take-offs. We at IM Transmission represent these world-leading products and can help you with service, repairs, replacement units and spare parts almost no matter what your needs are. Welcome to us, your authorized representative of Allison gearboxes and Chelsea PTOs Find the right power take-off with our calculation model. Recommended oil and filter change intervals