Your operation depends on the power driving it. And your transmission is as crucial to your power solution as the engine. Cat transmissions are proven in the oil and gas industry and widely known for their exceptional power, leading durability, ease of operation, and shifting options.TH55-E70 transmissions are ideal for pressure pumping applications. TH55-E70 transmissions are optimized for use with Cat 3512C (HD) and Cat 3516C (HD) engines. Cat transmissions are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat TH55-E70 oilfield transmission. Gross input power: 2461 bkW (3300 bhp).