Patent ID: 7850566

Claim:
A system for transmitting hydraulic pressure in an automatic transmission, the automatic transmission being housed in a transmission case, the system comprising: a valve body for generating the hydraulic pressure; a first hole unit in the transmission case, comprising at least one hole disposed substantially perpendicular to an output shaft of the automatic transmission so as to transmit the hydraulic pressure to a first passage; and a second hole unit comprising at least one additional hole for receiving the hydraulic pressure through the first passage and transmitting the hydraulic pressure to a second passage, wherein the at least one hole comprises at least two holes, disposed substantially parallel to each other and substantially perpendicular to the output shaft, and wherein the second hole unit further comprises at least two grooves, each receiving the hydraulic pressure from a respective one of the holes, wherein the at least one additional hole receives the hydraulic pressure from the grooves, and wherein one of the grooves is longer than the other groove.