R4A51 & V4A51 Models
The R4A51/V4A51 is a electronic controlled fully automatic 4-speed transmission made up of the torque converter and the gear train. A 3-element, 1-step, 2-phase torque converter with built-in torque converter clutch is used. The gear train of the R4A51/V4A51 transmission is made up of three sets of multiple disc clutches, two sets of multiple disc brakes, one set of one-way clutch and two sets of planetary carriers. See Fig 1 and Fig 2 .