GENERAL DESCRIPTION
- The transmission consists of the torque converter and gear train.
- The three-element, one-stage, two-phase type torque converter with a built-in damper
clutch has been adopted.
- The gear train of the F4A4A transmission consists of 3 sets of multi-disc type clutches,
2 sets of multi-disc type brakes, and 2 sets of planetary gears which are composed of a sun gear,
carrier, annulus gear, and pinion gear.
TRANSMISSION CONFIGURATION DRAWING
COMPONENTS AND FUNCTIONS
| Component |
Function |
|
| Underdrive clutch |
UD |
connects the input shaft to the underdrive sun gear. |
| Reverse clutch |
REV |
connects the input shaft to the reverse sun gear. |
| Overdrive clutch |
OD |
connects the input shaft to the overdrive planetary carrier. |
| Low-reverse brake |
LR |
holds the low-reverse annulus gear and the overdrive planetary carrier. |
| Second brake |
2ND |
holds the reverse sun gear. |
| One-way clutch-L |
OWC-L |
restricts the rotation direction of the low-reverse annulus gear. |
FUNCTION ELEMENT TABLE
| Operating element |
Engine start |
Parking mechanism |
Underdrive clutch (UD) |
Reverse clutch (REV) |
Over-drive clutch (OD) |
Low-reverse brake (LR) |
Second brake (2ND) |
One-way clutch (OWC-L) |
|
| Transmission range |
|||||||||
| P |
Parking |
OK |
× |
- |
- |
- |
× |
- |
- |
| R |
Reverse |
- |
- |
- |
× |
- |
× |
- |
- |
| N |
Neutral |
OK |
- |
- |
- |
- |
× |
- |
- |
| D |
1st |
- |
- |
× |
- |
- |
×* |
- |
× |
| 2nd |
- |
- |
× |
- |
- |
- |
× |
- |
|
| 3rd |
- |
- |
× |
- |
× |
- |
- |
- |
|
| 4th |
- |
- |
- |
- |
× |
- |
× |
- |
|
| note | * operates only when the vehicle is stationary [at approximately 10
km/h or less]. |