Parking Mechanism
When the shaft is in the "P" range, the parking pawl engages with the parking sprag provided on outer circumference of the annulus gear to fasten the output shaft, to prevent the wheels from rotating. In other words, when the select lever is set to the "P" range, the detent plate and the parking sprag rod move in the direction of arrow, causing the cam on the parking sprag rod to push up the parking pawl to engage with the sprag.
In case the parking pawl collides against a crest of the sprag, only the rod moves because the parking pawl cannot be moved upward, and the cam, while pressing the spring, collides with the parking pawl and the support, and is with held in this condition. If the car is moved even slightly in this condition, the turning of wheels causes the annulus gear to turn as well. Since the cam is pressed in the direction of arrow, the parking pawl is pushed up as a bottom of the sprag aligns with the parking sprag to engage with the sprag.
In this way, the parking mechanism eliminates any chances of the vehicle from being.
| No. | Cause | Symptom | Analysis | Remedy | Remarks |
|---|---|---|---|---|---|
| 1 | Locking due to cam broken | Forward and/ or reverse drive impossible intermittently | Parking sprag locks the annulus gear due to drifted cam | Replace parking sprag rod | |
| 2 | Detent spring roller separated | Looseness of manual lever | Detent plate not fixed properly | Install detent spring assembly |
POWER FLOW
| Selector lever position | Gear position | Clutches | Brakes | Remarks | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| F/C | R/C | E/C | K/D | L & R | OWC | |||||
| P | Parking | * □ | ||||||||
| R | Reverse | ◦ | ◦ | |||||||
| N | Neutral | * | ||||||||
| D | O/D S/W ON | O/D S/W OFF | 1st | ◦ | ◦ | |||||
| 2nd | ◦ | ◦ | ||||||||
| 3rd | ◦ | ◦ | Δ | |||||||
| 4th | ◦ | ◦ | ||||||||
| 2 | 1st | ◦ | ◦ | |||||||
| 2nd | ◦ | ◦ | ||||||||
| L | 1st | ◦ | ◦ | |||||||
| * - Engine start possible | ||||||||||
| □ - Parking mechanism | ||||||||||
| ◦ - Element engaged in each gear position | ||||||||||
| Δ - Pre-engaged element | ||||||||||
|
||||||||||
For each shift condition, certain holding units in the transaxle are used. Knowing which holding element is used and how they are connected in the transaxle, we can trace the power flow through the transaxle for each shift condition. One set of pinions, the short pinions, meshes with the reverse sun gear.
The other set, the long pinions, meshes with both the forward sun gear and with the annulus gear. The two sets of pinions also mesh with each other in pairs. The pinion carrier is built as a unit with the low reverse brake hub and the outer race of the one-way clutch. Power input is to either of the two sun gears.
The reverse sun gear is connected to the front clutch retainer through the kick-down drum. The forward sun gear is connected to the rear clutch hub. So by engaging either the front or the rear clutch, power is directed to either the reverse or the forward sun gear. When both front and rear clutches are engaged, the gear set is locked, and power passes directly through the transaxle. Power output is through the annulus gear, which has the parking sprag on the outer circumference and is connected to the output flange.