Automatic Transmission
In this manual: Automatic Transmission
~6min read
6special tools
Specifications
Specifications
Automatic Transmission
| Item | Specification | |
| Transaxle Model | A4CF1 | |
| Engineering Model | Gasoline 1.4 MPI | |
| Torque Converter Type | 3-Element, 1-Stage, 2-Phase Type | |
| Torque Converter Size | Φ 225 mm (8.8583 in.) | |
| Oil Pump Type | Paraxoid | |
| *ATF | Capacity | 6.8 L (1.8 U.S. gal, 7.2 U.S. qt, 5.98 Imp. qt) |
| Recommended | - ATF SP-III · Recommended transmission fluid: SK ATF SP-III, MICHANG ATF SP-III, NOCA ATF SP-III |
|
| Gear ratio | 1st | 2.919 |
| 2nd | 1,551 | |
| 3rd | 1.000 | |
| 4th | 0,713 | |
| Provide Regression | 2.480 | |
| Final gear ratio | 4.375 | |
| Components | Oil Filter | 1 unit |
| Grab | 3 units | |
| One-Way Clutch | 1 unit | |
| Brake | 2 units | |
| Planetary Gear Set | 2 units | |
| Fluid pressure balance piston | 2 units | |
| Accumulator | 4 units | |
| Solenoid valve | 6 units (*PWM: 5, *VFS: 1) | |
*PWM: Pulse Width Modulation
*VFS: Variable Force Solenoid
Gauges
| Item | Specification | |
| Oil Temperature Sensor | Type | *NTC thermistor |
| Temp. [(°C)°F] / Resistance (kΩ) | (-40)-40/139,5 | |
| (-20)-4,0/47,4 | ||
| (0)32,0 / 18,6 | ||
| (20)68,0/8,1 | ||
| (40)104,0/3,8 | ||
| (60)140,0/1,98 | ||
| (80)176,0/1,08 | ||
| (100)212,0/0,63 | ||
| (120)248,0/0,38 | ||
| (140)284,0/0,25 | ||
| (160)320,0/0,16 | ||
| Input Speed Sensor | Type | Hall Effect Sensor |
| Current (mA) | 22 (max.) | |
| Output voltage (V) | High: 4.8–5.2 | |
| Low: Below 0.8 | ||
| Output Speed Sensor | Type | Hall Effect Sensor |
| Current (mA) | 22 (max.) | |
| Output voltage (V) | High: 4.8–5.2 | |
| Low: Below 0.8 | ||
*NTC: Negative Temperature Coefficient
Solenoid valves
| Item | Specification | |
| *PCSV-A | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 50 Hz | |
| * PCSV-B | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 50 Hz | |
| * PCSV-C | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 50 Hz | |
| *PCSV-D | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 50 Hz | |
| *SCSV-A | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 50 Hz | |
| *LINE_VFS | Type | Normally open |
| Input voltage | 12 V | |
| Coil Resistance | 3.5 ± 0.2 Ω (at 25 °C, 77°F) | |
| Frequency | 400 - 1000 Hz | |
*PCSV-A: Overdrive clutch, Low & Reverse brake control solenoid valve
*PCSV-B: 2-4 brake control solenoid valve
*PCSV-C: Underdrive clutch control solenoid valve
*PCSV-D: Damper clutch control solenoid valve
*SCSV-A: ON/OFF solenoid valve
*LINE_VFS: Line Pressure Control Solenoid Valve
Solenoid Valve Operation Table
| Range | Solenoid valve | ||||
| *PCSV-A | * PCSV-B | * PCSV-C | *PCSV-D | *SCSV-A | |
| N, P | ● | ● | ● | ||
| 1st | ● | ● | ● | ||
| 2nd | ● | ● | |||
| 3rd | ● | ● | |||
| 4th | ● | ● | |||
| Provide Regression | ● | ● | |||
Clutch and Brake Table
| Range | Grab | Brake | |||
| CP | OD | REV | LH and RH | 2nd | |
| N, P | ● | ||||
| 1 | ● | ● | |||
| 2 | ● | ● | |||
| 3 | ● | ● | |||
| 4 | ● | ● | |||
| R | ● | ● | |||
Tightening torque
| Item | N·m | kgf·m | lbf·ft |
| Manual control lever nut | 16,7 - 20,6 | 1,7 - 2,1 | 12,3 - 15,2 |
| Park/neutral position switch nut | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Shift cable bracket bolt | 14,7 - 21,6 | 1,5 - 2,2 | 10,8 - 15,9 |
| Shift Cable Mounting Nut | 9,8 - 13,7 | 1,0 - 1,4 | 7,2 - 10,1 |
| Shift Cable Bracket Mounting Nut | 11,8 - 14,7 | 1,2 - 1,5 | 8,7 - 10,8 |
| Shift lever bracket bolt | 8,8 - 13,7 | 0,9 - 1,4 | 9,4 - 10,1 |
| Torque converter bolt | 45,1 - 52,0 | 4,6 - 5,3 | 33,3 - 38,3 |
| Transmission Support Bracket Mounting Bolt | 58,9 - 78,5 | 6,0 - 8,0 | 43,4 - 57,8 |
| Transmission Mounting Bracket Bolt | 88,3 - 107,9 | 9,0 - 11,0 | 65,1 - 79,6 |
| Roll Rod Support Bracket Mounting Bolt | 49,0 - 68,6 | 5,0–7,0 | 36,2 - 50,6 |
| Steering Rod Bracket Mounting Bolt | 49,0 - 63,7 | 5,0 - 6,5 | 36,2 - 47,0 |
| 107,9 - 127,5 | 11,0 - 13,0 | 79,6 - 94,0 | |
| Starter motor bolt | 49,0 - 63,7 | 5,0 - 6,5 | 36,2 - 47,0 |
| Transmission Upper Mounting Bolt | 42,2 - 53,9 | 4,3 - 5,5 | 31,1 - 39,8 |
| Transmission Lower Mounting Bolt | 42,2 - 53,9 | 4,3 - 5,5 | 31,1 - 39,8 |
| 42,2 - 48,1 | 4,3 - 4,9 | 31,1 - 35,4 | |
| ATF drain plug | 39,2 - 49,0 | 4,0–5,0 | 28,9 - 36,2 |
| Transmission Control Module Mounting Nut | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Valve body cover bolt | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Valve body assembly bolt | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Solenoid valve support bracket bolt | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Input and output speed sensor bolt | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
| Oil Filter Mounting Bolt | 9,8 - 11,8 | 1,0 - 1,2 | 7,2 - 8,7 |
Special Service Tools
Special Service Tools
| Tool Name/Number | Illustration | Description |
| Engine mount bracket (beam) 09200-3N000 |
 |
Used to support the engine assembly when removing/installing the transaxle. Used with adapter (09200-4X000) and support (09200-2S000) |
| Engine Support Bracket (Stand) A: 09200-2S000 B: 09200-2C100 C: 09200-2C200 |
 |
Used to support the engine assembly when removing/installing the transaxle Used with Bar (09200-3N000) and Adapter (09200-4X000) |
| Engine Mount Support (Adapter) 09200-4X000 |
 |
Used to support the engine assembly during transaxle removal/installation Used with rod (09200-3N000) and support (09200-2S000) |
| Oil Seal Installer 09453-2F300 |
 |
Used to install the differential oil seal. |
| Oil pressure switch (adapter) 09452-21000 |
 |
Oil pressure measurement (used with 09452-21500) Used to measure oil pressure Used with gauge (09452-21500) and adapter (09452-21600) |
| Oil pressure gauge 09452-21500 |
 |
Used to measure oil pressure Used with adapter (09452-21000, 09452-21600) |
| Oil pressure switch (adapter) 09452-21600 |
 |
Used to measure oil pressure Used with gauge (09452-21500) and adapter (09452-21000) |
| Inhibitor Switch Alignment Pin 09480-A3800 |
 |
Used to hold the "N" range position when installing the inhibitor switch. |
| Engine Mount 09221-A3100 |
 |
Used to support the engine assembly when removing/installing the transaxle. Used with engine support |
Engine Mount Bracket Assembly Drawing
Troubleshooting
Troubleshooting
Limp Home Mode
Provides fail-safe function that prevents hazardous situations in case of transaxle malfunction. The vehicle will operate in fail-safe mode if the transaxle malfunctions. In this mode the transaxle operates at minimum function level (fixed gear, limited shifting, reverse, neutral), allowing the vehicle to reach a service center.
Troubleshooting
| Symptom of Malfunction | Suspected Area | Remedy |
| Shift Delay, Shift Shock, Poor Acceleration | Clutch/brake damaged | Replace the brake or clutch. |
| Faulty hydraulic control | Inspect the solenoid valve. | |
| Faulty hydraulic supply | Check the fluid level. | |
| Check fluid cleanliness. | ||
| Replace the oil pump. | ||
| TCM learning not performed | Perform TCM adaptive learning values. | |
| Mechanical fail-safe mode Locked in 3rd gear, manual shifting disabled |
Faulty solenoid valve | Inspect the solenoid valve. |
| Replace the solenoid valve. | ||
| Faulty clutch/brake | Replace the brake or clutch. | |
| Faulty lock switch | Replace the inhibitor switch. | |
| Faulty TCM | Replace the TCM. | |
| Limp-home mode Locked in 4th gear, manual shifting (2nd -> 3rd, 3rd -> 2nd enabled) |
Faulty input and output speed sensor | Replace the input and output speed sensors. |
| Manual shift disabled | Faulty TCM | Replace the TCM. |
| Faulty connector connection | Check the manual mode connector connection. | |
| Faulty manual mode switch | Replace the manual mode switch housing. |
Test yourself
A quick Kia Rio YB quiz: every answer comes with an explanation and a link to the manual page.
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