Shri Suri has developed a new concept of an integrated power pack involving reverse-governing techniques for the diesel engine superimposed on a hydromechanical transmission called Suri-Transmission. This has resulted in substantially increasing the efficiency of diesel locomotives. Suri-Transmission achieves the mathematical peak of efficiency in transmission of power and provides means for changeover from one gear step to another, under full load and speed, without causing shock or interruption of Suri-Transmission and its various improvements are covered by 36 patent specifications in eleven major countries. The first transmission built and tested for 650 horse power in now in successful operation.