GEARTRAIN STRUCTURE [LA4AX-EL (CD4E)]

BUE051700000N23

• The geartrain consists of the planetary gear set, apply components, and final drive gear set and differential.

Planetary Gear Set

• The automatic transaxle has two planetary gear set to provide operation in reverse and four forward speeds.
• The gear set are consists of the following components:
- Low/intermediate sun gear component
- Low/intermediate carrier component
- Low/intermediate ring gear component
- Reverse/overdrive sun gear and shell component
- Reverse/overdrive carrier component
- Reverse/overdrive ring gear component

1
Sun gear component
2
Carrier component
3
Ring gear component
4
Sun gear and shell component
5
Carrier component
6
Ring gear component
7
Splined together
8
Splined together

Drive Chain Component

• A chain drive transfers torque from the torque converter turbine to the planetary gear set.
• The chain drive consists of the following components:
- Reverse/overdrive ring gear component (which acts as a drive sprocket)
- Driven sprocket
- Drive chain
• The drive chain connects the reverse/overdrive sun gear with the driven sprocket. The final drive sun gear located on top of the driven sprocket meshes with the final drive gear set.
• The final drive consists of a planetary gear set that transfers and multiplies torque from the planetary gear set to the differential.
• The final drive consists of the following components:
- Final drive sun gear: is chain driven by the reverse/overdrive ring gear component and transfers torque to the final drive carrier.
- Final drive carrier: the final drive carrier acts as the driven member and is part of the differential case.
- Final drive ring gear: is held by the converter housing and is always the held member of the final drive planetary gear set.

1
Ring gear component
2
Drive chain
3
Driven sprocket component

Differential

• The differential component drives the differential pinion gears and the differential side gears which in turn drive the front wheel drive shaft and joints, and provides differential action if driving wheels are turning at different speeds.
• The differential component consists of the following components:
- Differential case (part of the final drive carrier)
- Two pinion gears (supported by a pinion shaft)
- Two side gears (supported by the differential case and drive shafts)

1
Differential case (with final drive carrier)
2
Ring gear
3
Pinion shaft
4
Pinion thrust washer
5
Side gear thrust washer
6
Side gear
7
Pinion gear