AUTOMATIC TRANSMISSION(4AT) > General Description
|
Model |
2.0 L DOHC |
2.5 L SOHC |
2.5 L Turbo |
|
Type |
Symmetric, 3 element, single stage, 2 phase torque converter | ||
|
Stall torque ratio |
2.0 — 2.2 |
2.05 — 2.35 | |
|
Nominal diameter |
236 mm (9.29 in) |
246 mm (9.69 in) | |
|
Stall speed (at sea level) |
2,100 — 2,600 rpm |
2,200 — 2,700 rpm |
2,800 — 3,300 rpm |
|
One-way clutch |
Sprag type one-way clutch | ||
|
Type |
Parachoid constant-displacement pump | |
|
Driving method |
Driven by engine | |
|
Number of teeth |
Inner rotor |
9 |
|
Outer rotor |
10 | |
3. TRANSMISSION CONTROL ELEMENT
|
Type |
4-forward, 1-reverse, double-row planetary gears |
|
Multi-plate clutch |
3 sets |
|
Multi-plate brake |
2 sets |
|
One-way clutch (sprag type) |
1 set |
|
Gear ratio | |
|
1st |
2.785 |
|
2nd |
1.545 |
|
3rd |
1.000 |
|
4th |
0.694 |
|
Rev. |
2.272 |
|
Model |
2.0 L DOHC |
2.5 L SOHC |
2.5 L Turbo |
|
Number of front sun gear teeth |
33 | ||
|
Number of front pinion teeth |
21 | ||
|
Number of front internal gear teeth |
75 | ||
|
Number of rear sun gear teeth |
42 | ||
|
Number of rear pinion teeth |
17 | ||
|
Number of rear internal gear teeth |
75 | ||
|
Number of high clutch drive plates |
4 |
5 | |
|
Number of low clutch drive plates |
5 |
7 | |
|
Number of reverse clutch drive plates |
2 | ||
|
Number of drive plates for the 2-4 brake |
3 |
4 | |
|
Number of drive plates for low & reverse brake |
4 |
5 |
7 |
|
P (Park) |
Transmission is in neutral, output member is fixed, engine start is possible |
|
R (Reverse) |
Transmission is in reverse. |
|
N (Neutral) |
Transmission is in neutral and engine start is possible |
|
D (Drive) |
4-forward automatic gear change 1st ← → 2nd ← → 3rd ← → 4th |
|
SPORT mode |
4-forward automatic gear change 1st ← → 2nd ← → 3rd ← → 4th |
|
Manual mode (+) |
4-forward manual gear change (shift up) 1st → 2nd → 3rd → 4th |
|
Manual mode (−) |
4-forward manual gear change (shift down) 1st ← 2nd ← 3rd ← 4th |
|
Control method |
Wire cable type |
7. HYDRAULIC CONTROL AND LUBRICATION
|
Type |
Electronic hydraulic control [4 forward gear changes made by electronic signals of vehicle speed and accelerator (throttle) opening] | |
|
Fluid |
Recommended materials |
SUBARU ATF |
|
Alternative |
Idemitsu “ATF HP” | |
|
CAUTION: Always use recommended or alternative products for the ATF. If those other than recommended or specified as alternatives are used, it will be a cause for problems. If the recommended ATF or alternative is difficult to obtain, it is possible to use DEXRON III as a temporary solution, but it is necessary to change to the specified ATF as soon as possible. | ||
|
Fluid capacity |
2.0 L DOHC model |
8.4 — 8.7 L (8.9 — 9.2 US qt, 7.4 — 7.7 Imp qt) |
|
2.5L SOHC model and 2.5 L turbo model |
9.3 — 9.6 L (9.8 — 10.1 US qt, 8.2 — 8.4 Imp qt) | |
|
Lubrication system |
Forced feed lubrication with oil pump | |
|
Oil |
Automatic transmission fluid (see above) | |
|
Cooling system |
2.0 L (non-turbo model) |
2.0 L (Except for non-turbo models) |
|
ATF warmer mounted directly on the transmission |
Liquid-cooler incorporated in radiator | |
|
Inhibitor switch |
12 poles | |
|
Transmission harness |
20 poles | |
|
Model |
2.0 L DOHC |
2.5 L SOHC |
2.5 L Turbo |
|
Transfer type |
Multi-plate transfer (MP-T) | ||
|
Number of transfer clutch drives & driven plates |
4 |
5 |
6 |
|
Control method |
Electronic hydraulic type | ||
|
Lubricant |
Same automatic transmission fluid as used in the automatic transmission | ||
|
1st gear speed reduction gear ratio |
1.000 (53/53) | ||
|
Model |
2.0 L DOHC |
2.5 L SOHC |
2.5 L Turbo |
|
Front final reduction gear ratio |
4.111 (37/9) |
4.444 (40/9) |
4.111 (37/9) |
|
Lubrication oil |
| ||||
|
(1) |
Item |
(3) |
API standard | ||
|
(2) |
Front differential gear oil |
(4) |
SAE viscosity No. and applicable temperature | ||
|
Front differential oil capacity L (US qt, Imp qt) |
1.1 — 1.3 (1.2 — 1.4, 1.0 — 1.1) | ||||