The internal gear is normally free-wheeling so that the reverse gearset is idling. The sun gear, connected to the rear unit internal gear, is the driving member of the re verse unit gearset, and the reverse internal gear is the reaction member.
6-1 Reverse is obtained through a third planetary gearset. The planetary gearset rotates as a unit providing direct drive. When the rear unit clutch is applied, the rear hub and drum are locked together and the internal gear and sun gear are driven at the same speed. Power applied to the sun gear causes the planet carrier to rotate around the internal gear, providing 2.55 to 1 reduction. With the rear unit clutch released, the rear internal gear rear unit drum is held stationary by the rear sprag, which in turn is held stationaryīy the neutral clutch. Power from the front unit planet carrier is directed through the main fluid coupling to the main shaft and then to the sun gear of the rear planetary gearset. Power is transmitted from the front unit planet carrier through the intermediate shaft to the rear unit hub. 6-1 Power from the front unit is transmitted to the rear unit through two shafts: the intermediate shaft and the mainshaft. When the front unit coupling is filled with oil, the sun gear and internal gear are driven at the same speed and the planetary gearset rotates as a unit, providing direct drive. When power is applied to the internal gear with the front unit coupling empty, the sun gear is held stationary by the front sprag and the planet carrier rotates around the sun gear. 6-1 In the front unit, the internal gear of the plane tary gear set is the driving member and the sun gear is the reaction member. The gear reductions required to obtain the various speeds are provided by planetary gearsets.įront Unit Fig.
PRINCIPLES OF OPERATION The 1963 Cadillac Hydra- Matic transmission has four forward speeds and one reverse. The strainer should be replaced every 30,000 miles, or in any case, where a major transmission fail ure has occurred. An internal by-pass is provided in the strainer which permits increased oil flow during cold operation when the oil is heavier. The oil intake system of the 1963 transmission incorporates a paper element type oil strainer on the intake pipe. Oil from the pump passes through the cooler and then back to the main fluid coupling. The oil cooler for the 1963 transmission is located in the lower tank of the radiator.
Missions are identified by an orange name plate with the letters CA preceding the serial number.
Series cars and the oil pump of slightly greater cooling re cars. Transmissions used on 75 commercial chassis have an greater capacity to meet the quirements on these heavier The serial num ber on these transmissions is preceded by the letter C. The transmission used on all 1963 model 60 and 62 series cars is identified by a black name plate attached to the lower left hand corner of the transmission case rear face. Two models of this transmission are used to meet the requirements of the various series cars. A controlled coupling Hydra- Matic transmission is used as standard equipment on all 1963 Cadillac cars.