Technical characteristics of automatic transmissions F4A42–1, F4A42–2
Name F4A42–1 / F4A42–2
Type of torque converter: 3 elements, 1 stage, 2 phases
Transmission type: 4 forward and 1 reverse gear
Gear ratio:
- – 1st gear 2.842 / 2.842
- – 2nd gear 1.529 / 1.529
- – 3rd gear 1.000 / 1.000
- – 4th gear 0.712 / 0.712
- – Reverse gear 2.480 / 2.480
- Final gear: 4.042 / 3.770
Adjustment data
Name - Standard value
Preload of the driven shaft, mm: 0.01–0.09
Band brake axial clearance, mm: 0–0.16
Low and reverse gear band brake axial clearance, mm: 1.35–1.81 (F4A42–1)/1.65–2.11 (F4A42–2)
Second gear band brake axial clearance, mm: 0.79–1.25
Downshift sun gear axial clearance, mm: 0.25–0.45
Input shaft axial clearance, mm: 0.045–0.105
Differential preload, mm: 0.70–1.45
Downshift clutch axial clearance, mm: 1.6–1.8
Shift return spring and overdrive axial clearance, mm: 0–0.09
Overdrive clutch axial clearance, mm: 1.6–1.8
Reverse clutch axial clearance, mm: 1.5–1.7
Gap between differential case and pinion, mm: 0.025–0.105
Tightening torques, Nm
Wire harness mounting bracket 20–26
Control cable mounting bracket 20–26
Eye bolt 27–33
Oil Cooler Pipe 10–12
Oil Filter 11–13
Input Shaft Speed Sensor 10–12
Driven Shaft Speed Sensor 10–12
Control Lever 18–25
Transmission Range Switch 10–12
Vehicle Speed Sensor 4–6
Valve Body Cover 8–10
Valve Body Fastening Bolt 10–12
Oil Temperature Sensor 10–12
Shaft Lock 5–7
Rear Cover 20–26
Housing torque converter 42–54
Oil pump
Driven shaft lock nut 160–180
Output shaft bearing holder 20–26
Oil drain plug 29–34
Differential gear 130–140
Valve body 10–12
Solenoid valve holder 5–7
Lubricants
Genuine Diamond ATF SP–II M transmission oil
Oil capacity, l: 8.5
Sealants
Elements - Sealant
Rear cover - Hyundai sealant TB1281 B or equivalent
Torque converter housing - Sealant Hyundai TB1281 B or equivalent
Valve body cover - Sealant Hyundai TB1281 B or equivalent
Possible malfunctions of the automatic transmission
Malfunction - possible causes of the malfunction
No communication with the HI - SCAN scanner:
If there is no communication with the HI - SCAN scanner, the electrical circuit may be faulty or the TCM may not be functioning
- - Damage to the electrical circuit
- - Damage to the connector
- - Damage to the TCM
Cannot start the engine:
Cannot start the engine when the selector lever is in the N or P.
In such cases, the cause may be a malfunction of the engine management system, torque converter, or oil pump.
- - Damage to the engine management system
- - Damage to the torque converter
- - Damage to the oil pump
No forward movement:
If there is no forward movement when moving the selector lever from position N to D, 3, 2, or L with the engine idling, the cause may be an abnormal da line pressure or damage to the downshift solenoid valve or valve body.
- - Abnormal line pressure
- - Damage to the downshift solenoid valve
- - Damage to the downshift clutch
- - Damage to the valve body
No reverse movement:
If there is no reverse movement when the selector lever is moved from N to R with the engine idling, the cause may be abnormal pressure in the reverse clutch, low range brake, and reverse gear, or valve body.
- - Abnormal pressure in the reverse clutch
- - Abnormal low pressure in the low range brake and reverse gear
- - Damage to the low range clutch and reverse gear reverse
- - Damaged valve body
No forward or reverse movement:
If there is no forward or reverse movement when the selector lever is moved from the N position to any position while the engine is idling, the cause may be abnormal line pressure, damaged gearbox, oil pump or valve body.
Abnormal line pressure
- - Damaged gearbox
- - Damaged oil pump
- - Damaged valve body
Engine stalling when moving off:
If the engine stalls when the selector lever is moved from the N position to D or R while the engine is idling, the cause may be damaged engine management system, clutch damper solenoid valve, valve body or torque converter
- - Damage to the engine management system
- - Damage to the clutch damper solenoid valve
- - Damage to the valve body
- - Damage to the torque converter
Jerking or slow response when moving the selector lever from the N to D position:
If there is jerking or a delay of more than 2 seconds when moving the selector lever from the N to D position with the engine idling, the cause may be damage to the downshift, downshift pressure or clutch, valve body or position switch
- - Abnormal pressure in the downshift
- - Abnormal low pressure in the low and reverse brake
- - Damage to the solenoid downshift valve
- - Damage to valve body
- - Damage to position switch
Jerking or slow response when shifting selector lever from N to R:
If there is jerking or a delay of more than 2 seconds when shifting selector lever from N to R with engine idling, the cause may be abnormal reverse clutch pressure or back pressure in the brake system, reverse clutch, low and reverse brake, valve body or position switch
- - Abnormal reverse clutch pressure
- - Abnormal low pressure in low and reverse brake
- - Damage to low and reverse solenoid valve
- - Damage to the reverse clutch
- - Damage to the valve body
- - Damage to the position switch
Jerking or slow response when moving the selector lever from N to D, N or R:
If there is jerking or a delay of more than 2 seconds when moving the selector lever from N to D or from N to R with the engine idling, the cause may be abnormal pressure in the line or damage to the oil pump or valve body.
Jerking and skipping:
If there is jerking when driving when moving the selector lever and a higher gear is engaged than the engine speed, the cause may be abnormal pressure in the line or damage to the solenoid valve, oil pump, valve body, brake or clutch.
- - Abnormal line pressure
- - Damage to each solenoid valve
- - Damage to the oil pump
- - Damage to the valve body
- - Damage to each brake or clutch
Changes in travel position:
All positions
If all travel positions are displaced during driving, the cause may be damage to the output shaft speed sensor, TPS, or solenoid valve.
- - Damage to the throttle sensor
- - Damage to each solenoid valve
- - Abnormal line pressure
- - Damage to the valve body
Some positions:
If some of the movement positions are shifted during movement, the reason may be damage to the valve body
- - Damaged valve body
- - No shift
No diagnostic codes:
If there is no shift while driving and there are no diagnostic codes, the cause may be a damaged transmission range switch or TCM
- - Damaged transmission range switch
- - Damaged valve body
Driving irregularities:
Weak acceleration:
If the vehicle accelerates poorly even when forced to downshift, the cause may be a damaged engine management system, brake, or clutch.
- - Damaged engine management system
- - Damaged brake or clutch
Transmission range switch:
Possible cause is damage to the electrical circuit of the lock switch, ignition switch, or TCM
- Damage to the ignition switch
Vehicle speed sensor:
- Possible cause is damage to the electrical circuit of the vehicle speed sensor or TCM