PLANETARY GEARSETS CONSTRUCTION [5R55S]
id0513c1321100
• The 5R55S transmission has three planetary gearsets to provide operation in reverse and in five forward speeds.
• The overdrive planetary gearset has the following parts:
-
― Overdrive sun gear
― Overdrive planetary carrier component
― Overdrive ring gear
• The input shaft rotates the overdrive planetary carrier component as a driving member. The input shaft may also drive the overdrive ring gear directly with a 1.00 to 1 ratio.
• When the transmission case holds the overdrive sun gear stationary, the overdrive planetary carrier drives the overdrive ring gear with an overdrive ring gear with an overdrive ratio of either 0.71 to 1.
• The forward and reverse planetary gearsets have the following parts:
-
― Forward/reverse sun gear
― Forward planetary carrier component
― Forward ring gear
― Reverse planetary carrier component
― Output ring gear
• The forward/reverse sun gear is a driving member in reverse. The forward ring gear is a driving member in each forward gear.
• The forward/reverse sun gear and forward ring gear are driving members for a 1.00 to 1 ratio in 4GR and 5GR.
• The forward planetary carrier component and output ring gear are both connected to the output shaft and are driven members in reverse and in all forward speeds.
• The transmission case holds the reverse planetary carrier component stationary in 1GR and 2GR.
• The reverse planetary carrier component is a member that rotates at a different speed that the driving and driven members in 3GR.
• The reverse planetary carrier component rotates at the same speed as the forward/reverse sun gear and forward ring gear as part of the 1.00 to 1 ratio in 4GR and 5GR.
