Hyundai Elantra: Repair procedures (A4CF2) - Automatic Transaxle System - Automatic Transaxle System - Hyundai Elantra HD 2006–2010 Service ManualHyundai Elantra: Repair procedures (A4CF2)

Basic Inspection Adjustment

Transaxle Fluid Level
Drive the vehicle until the fluid reaches normal operating temperature [70~80°C(158~176°F)].
Place the vehicle on a level surface.
Move the gear selector lever through all gear positions. This will fill the torque converter with trans fluid. Set the selector lever to the "N" (Neutral) position.
Before removing the oil level gauge, wipe all contaminants from around the oil level gauge. Then take out the oil level gauge and check the condition of the fluid.
If the fluid smells as if it is burning, it means that the fluid has been contaminated by fine particles from the bushes and friction materials, a transmission overhaul may be necessary.
Check that the fluid level is in the "HOT" mark on the oil level gauge. If fluid level is low, add automatic transaxle fluid until the level reaches the "HOT" mark.

Automatic transaxle fluid :
Automatic transaxle fluid capacity:
6.6liter(6.9 US qt, 5.81lmp.qt)

Low fluid level can cause a variety of abnormal conditions because it allows the pump to take in air along with fluid. Air trapped in the hydraulic system forms bubbles, which are compressible. Therefore, pressures will be erratic, causing delayed shifting, slipping clutches and brakes, etc. Improper filling can also raise fluid level too high. When the transaxle has too much fluid, gears churn up foam and cause the same conditions which occur with low fluid level, resulting in accelerated deterioration of automatic transaxle fluid. In either case, air bubbles can cause overheating, and fluid oxidation, which can interfere with normal valve, clutch, and brake operation. Foaming can also result in fluid escaping from the transaxle vent where it may be mistaken for a leak.
Insert the oil level gauge securely.
When new, automatic transmission fluid should be red, The red dve is added so the assembly plant can identify it as transmission fluid and distinguish it from engine oil or antifreeze. The red dve, which is not an indicator of fluid quality, is not permanent. As the vehicle is driven the transmission fluid will begin to look darker. The color may eventually appear light brown.
If you have a fluid changer, use this changer to replace the fluid. If you do not have a fluid replace the fluid by the following procedure.
Disconnect the hose, which connects the transmission and the oil cooler (inside the radiator).
Start the engine and let the fluid drain out.

Running conditions : "N" range with engine idling

The engine should be stopped within one minute after it is started. If the fluid has all drained out before then, the engine should be stopped at that point.
Remove the drain plug(A) from the bottom of the transmission case to drain the fluid.

Install the drain plug via the gasket, and tighten it the specified torque.

Tightening torque :
35~45 Nm (3.5~4.5kgf.m, 25~32lb-ft)

Pour the new fluid in through the oil filler tube.
Stop pouring if the full volume of fluid cannot be poured in.
Repeat the procedure in step (2).
Check the old fluid for contamination. If it has been contaminated, repeat the steps (5) and (6).
Pour the new fluid in through the oil filler tube.
Reconnect the hose, which was disconnected in step (1) above, and firmly replace the oil level gauge.
(In case of this "replace", this means after wiping off any dirt around the oil level gauge, insert it into the filler tube.)
Start the engine and run it at idle for 1~2 minutes.
Move the select lever through all positions, and then move it to the "N" or "P" position.
Drive the vehicle until the fluid temperature rises to the normal temperature (70~80°C(158~176°F)), and then check the fluid level again. The fluid level must be at the HOT mark.
Firmly insert the oil level gauge into the oil filler tube.
Torque Converter Stall Test
This test measures the maximum engine speed when the select lever is at the "D" or "R" position and the torque converter stalls to test the operation of the torque converter, starter motor and one-way clutch operation and the holding performance of the clutches and brakes in the transmission.
Do not let anybody stand in front of or behind the vehicle while this test is being carried out.
Check the automatic transmission fluid level and temperature and the engine coolant temperature.
Fluid level : At the HOT mark on the oil level gauge
Fluid temperature : 80~100°C (176~212°F)
Engine coolant temperature : 80~100°C (176~212°F)
Check both rear wheels (left and right).
Pull the parking brake lever on, with the brake pedal fully depressed.
Start the engine.
Move the select lever to the "D" position, fully depress the accelerator pedal and take a reading of the maximum engine speed at this time.
The throttle should not be left fully open for any more than eight seconds.
If carrying out the stall test two or more times, move the select lever to the "N" position and run the engine at 1,000 r/min to let the automatic transaxle fluid cool down before carrying out subsequent tests.
Move the select lever to the "R" position and carry out the same test again.

Stall rpm : 2,000~2,700 RPM

Passable cause
R range slip
REV in D range normal
L/R in D range abnormal
D1 rang slip
D range 1st/ Sports mode 1st
L/R in reverse range abnormal
UD in reverse range normal
D3 range slip
3rd gear hold
OD in 3rd gear slip
(1st and 2nd gear normal)
Forwarding, reverse slip
D range, R range
Torque converter
Oil pump, Manual valve in the valve
Driving device abnormal

Hydraulic Pressure Test
Warm up the engine until the automatic transaxle fluid temperature is 80~100°C(176~212°F).
Jack up the vehicle so that the wheels are free to turn.
Connect the special tools(09452-21500, 09452-21000) oil pressure gauge to each pressure discharge port.
Measure the hydraulic pressure at each port under the conditions given in the standard hydraulic pressure table, and check that the measured values are within the standard value ranges.
If a value is outside the standard range, correct the problem while referring to the hydraulic pressure test diagnosis table.
Bottom side

1. RED pressure port
2. OD pressure port
3. 2/4 pressure port
4. REV pressure port
5. DA pressure port
6. UD pressure port
7. LR pressure port
8. DR pressure port

Standard Hydraulic Pressure Table

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