I-Hydraulic transmission gearbox, eyaziwa nangokuthi i-hydraulic transmission, iyithuluzi elisebenzisa amandla we-hydraulic ukudlulisa i-torque kanye nokunyakaza okujikelezayo phakathi kwamashafti amabili.Ama-gearbox ashayelwa ngamanzi asetshenziswa kakhulu ezimotweni ezisindayo, emishinini yokwakha nasezisetshenziswa zasolwandle ngokusebenza kahle kwazo okuphezulu, ukulawula kalula nokuthembeka.I-hydraulic transmission gearbox ivamise ukwakhiwa ngamaphampu asebenza ngogesi, ama-hydraulic motors, amasethi amagiya, ama-valve asebenza ngogesi nezinye izinto.