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Automatic Transaxle Hydraulic System Hyundai Santa Fe III

Automatic Trans 27 illustrations ~991 words

Description

The hydraulic system consists of oil, an oil filter, an oil pump, and a valve body (valves and solenoid valves).

The oil pump is powered by the engine. ATF passes through the oil filter and gets distributed along the oil channels.

The oil becomes highly pressurized as it exits the oil pump and passes through the line pressure valve before being fed to the clutch & brake control valve, clutch, and brakes. TCM controls the hydraulic pressure using solenoid valves and controls clutch and brake operations.

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Scheme 45: Component Location
Scheme 45: Component Location

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Scheme 46

The oil pump is built-in as a single unit with the 26 Brake chamber. Rotation of the pump builds the hydraulic pressure needed for the lubrication of the various parts of the transaxle and operation of the clutch and brakes. The oil also circulates through the torque converter and the cooler.

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Scheme 47: Description
Scheme 47: Description

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Scheme 48: Component Location
Scheme 48: Component Location

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Scheme 49: Component
Scheme 49: Component

Scheme 50

Scheme 50: Oil pump operation flow
Scheme 50: Oil pump operation flow

Scheme 51

Scheme 51: Component Location
Scheme 51: Component Location

Oil level Check

Note. A check of ATF level is not normally required during scheduled services. If an oil leak is found, perform the oil level check procedure after repairs are completed.

CAUTIONWhen checking the oil level, be careful not to enter dust, foreign matters, etc. from fill hole.

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Scheme 52

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Scheme 53

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Scheme 54
  1. Remove the ATF Injection hole (eyebolt) (A). Eyebolt tightening torque: 2.9 ~ 4.9 N.m (0.3 ~ 0.5 kgf.m, 2.2 ~ 3.6 lb-ft) CAUTION: Always replace the O-Ring (A) of the eyebolt use new one whenever loosening eyebolt.
  2. Add ATF SP-IV 700cc to the ATF injection hole.
  3. Start the engine. (Don't step on brake and accelerator simultaneously.)
  4. Confirm that the temperature of the A/T oil temperature sensor is 50~60°C (122~140°F) with the GDS.
  5. Shift the select lever slowly from "P" to "D", then "D" to "P" and repeat one more at idle. CAUTION: Stop in each gear position for 3 seconds.
  6. Lift the vehicle, then remove the oil level plug (A) from the valve body cover. CAUTION: At this time, the vehicle must be a horizontal state.
  7. If the oil flows out of the overflow plug in thin steady stream, the oil level is correct. Then finish the procedure and tighten the oil plug. NOTE: Oil level check (excess or shortage) method Excess: Drain quantity exceed 900cc for tow minutes. (50~60°C (122~140°F)) Shortage: No drain. CAUTION: If there is no damage at the automatic transaxle, oil cooler or oil cooler hoses and the drain plug is tight, ATF must flow out after performing above 1 to 7 procedures. After performing above 1 to 7 procedures, if the oil doesn't drop out, inspect the automatic transaxle assembly for oil leaks. CAUTION: Replace the gasket before reinstalling the oil level plug. Oil level plug tightening torque: Tightening up stopper
  8. Lower the vehicle with the lift and then tighten the eyebolt.

Replacement

Note. The ATF of 6-speed transaxle doesn't need to be replaced for normal usage. If the vehicle is driven under severe usage conditions, replace ATF every 60, 000 miles. Severe usage is defined as Driving in rough road (Bumpy, Gravel, Snowy, Unpaved road, etc.) Driving in mountain road, ascent/descent Repetition of short distance driving More than 50% operation in heavy city traffic during hot weather above 32°C(89.6°F). Police, Taxi, Commercial type operation or trailer towing, etc

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Scheme 55: Replacement
Scheme 55: Replacement
  1. Remove the drain plug (A) and reinstall the drain plug after draining ATF totally. Drain plug tightening torque: 38.2 ~ 48.1 N.m (3.9 ~ 4.9 kgf.m, 28.2 ~ 35.4 lb-ft) CAUTION: Replace the gasket before reinstalling the drain plug.
  2. Fill the oil about 5 liters.
  3. Check the oil level. (Refer to " «FLUID»(/hyundai/santa-fe/iii-2012-2016/remont/automatic-trans/#automatic-transaxle-hydraulic-system) ")

The valve body is essential to automatic transaxle control and consists of various valves used to control the oil feed from the oil pump. Specifically, these valves consist of pressure regulator valves, oil redirection valves, shift valves, and manual valves. The body also features electronic solenoid valves that ensure smooth gear changes.

Scheme 56

Scheme 56: Description
Scheme 56: Description

Scheme 57

Scheme 57: Component Location
Scheme 57: Component Location

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Scheme 58
Scheme 58

Scheme 59

Scheme 59: Valve Body Flow
Scheme 59: Valve Body Flow

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Scheme 60: Removal
Scheme 60: Removal

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Scheme 61

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Scheme 70

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Scheme 71
  1. Remove the air duct. (Refer to " «AIR CLEANER»(/hyundai/santa-fe/iii-2012-2016/remont/exhaust/#intake-and-exhaust-system) ")
  2. Remove the battery and the battery tray. (Refer to " «BATTERY»(/hyundai/santa-fe/iii-2012-2016/remont/charging-system/#charging-system) ")
  3. Remove the under cover (A). Tightening torque: 7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)
  4. Drain the coolant. (Refer to " «COOLANT»(/hyundai/santa-fe/iii-2012-2016/remont/cooling-system-mechanical/#engine-cooling-system) ")
  5. Remove the drain plug (A) and reinstall the drain plug after draining ATF totally. Drain plug tightening torque: 38.2 ~ 48.1 N.m (3.9 ~ 4.9 kgf.m, 28.2 ~ 35.4 lb-ft) CAUTION: Replace the gasket before reinstalling the drain plug.
  6. Remove the wiring bracket installation bolt (A).
  7. Remove the ATF Injection hole (eyebolt) (A). Eyebolt tightening torque: 2.9 ~ 4.9 N.m (0.3 ~ 0.5 kgf.m, 2.2 ~ 3.6 lb-ft) CAUTION: Replace the O-Ring (A) before reinstalling the eyebolt.
  8. Disconnect the coolant hose (B) after removing the coolant hose clamp (A).
  9. Disconnect the hose (B) after removing the automatic transaxle fluid cooler hose clamp (A). CAUTION: When hose & pipe assembly Align marking of pipe (B), marking of hose (A), and matching color each other.
  10. Remove the valve body cover (A). Tightening torque: (A) 13.7 ~ 15.7 N.m (1.4 ~ 1.6 kgf.m, 10.1 ~ 11.6 lb-ft) CAUTION: Replace the gasket (A) before reinstalling the valve body cover.
  11. Remove the bolts (C) after disconnecting the solenoid valve connector (B) and the oil temperature sensor connector (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  12. Remove the valve body assembly (A). Tightening torque: 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Installation

  1. Install in the reverse order of removal. NOTE: Adding coolant. (Refer to " «COOLANT»(/hyundai/santa-fe/iii-2012-2016/remont/cooling-system-mechanical/#engine-cooling-system) ") Adding Automatic Transaxle Fluid (ATF). (Refer to " «FLUID»(/hyundai/santa-fe/iii-2012-2016/remont/automatic-trans/#automatic-transaxle-hydraulic-system) ") Perform Transaxle Control Module (TCM) learning after replacing the valve body to prevent slow transaxle response, jerky acceleration and jerky startup. (Refer to " «REPAIR PROCEDURES»(/hyundai/santa-fe/iii-2012-2016/remont/automatic-trans/#automatic-transaxle-control-system) ")

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