Hyundai Ioniq: Dual Clutch Transmission Assembly / Transmission Gear Oil. Repair procedures

Hyundai Ioniq (AE) 2017-2024 Service Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Assembly / Transmission Gear Oil. Repair procedures

Inspection
   
In principle, the transmission oil is maintenance-free, and no exchange is required.
1.
Park the vehicle on flat ground and turn off the engine.
2.
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
3.
Remove the oil filler plug (A), and check the oil state and oil level.

   
For the accuracy, inspect the oil level after the oil is completely drained.
Loosen the drain plug (A) and wait for over 10 minutes until the oil is drained enough.
Tighten the drain plug.
Tightening torque :
44.1 - 58.9 N.m (4.5 - 6.0 kgf.m, 32.5 - 43.4 lb-ft)

Install the drain plug bolt with new gasket (A).
New gasket part number : 45323-39000

After the inspection, inject the oil through the filler plug hole according to the specification.
Oil capacity :
1.6 - 1.7 L (0.42 - 0.44 U.S gal., 1.69 - 1.79 U.S.qt., 1.41 - 1.49 lmp qt.)
While draining, some of the oil flows into the transmission part and the oil may be less than the specification by 0.1 - 0.15 L (0.03 - 0.04 U.S.gal., 0.10 - 0.16 U.S. qt., 0.09 - 0.13 lmp qt.) This is normal and additional oil injection is not required.
4.
Install the filler plug bolt (A) with new gasket.
Tightening torque :
58.9 - 78.5 N.m (6.0 - 8.0 kgf.m, 43.4 - 57.8 lb-ft)

   
The existing filler plug gasket (A) must be replaced with a new one. (Do not reuse it.)

5.
Install the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
Replacement
   
In principle, the Dual Clutch Transmission (DCT) oil is not changed under normal driving conditions.
However, under harsh driving conditions, it must be changed every 80,000 miles.
Harsh driving conditions are as follows:
High frequency driving on rough roads (bumpy roads, sand and gravel roads, snow-covered roads, and unpaved roads)
Frequent driving on mountain trails and inclines
In case the vehicle is used as a police vehicle, taxi, or for commercial or towing purposes
Frequent high speed driving (over 170 km/h)
In case of driving 50% or more of the total mileage in hot temperatures above 32°C and congested traffic
1.
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
2.
Remove the drain plug (A) and drain all the oil. Then install the drain plug with a new gasket.
Tightening torque :
44.1 - 58.9 N.m (4.5 - 6.0 kgf.m, 32.5 - 43.4 lb-ft)

   
Install the drain plug bolt with new gasket (A).
New gasket part number : 45323-39000

3.
Add new oil through the filler plug hole (A) and, fill it just below the plug opening.
Standard oil :
API Service GL-4, SAE 70W
Recommnend oil :
H.K.SHELL: SPIRAX S6 GHDE 70W DCTF PLUS, SK: HK D DCTF TGO-10 PLUS
Oil capacity :
1.6 - 1.7 L (0.42 - 0.44 U.S gal., 1.69 - 1.79 U.S.qt., 1.41 - 1.49 lmp qt.)

4.
Install the filler plug bolt with new gasket.
Tightening torque :
58.9 - 78.5 N.m (6.0 - 8.0 kgf.m, 43.4 - 57.8 lb-ft)
   
The existing filler plug gasket (A) must be replaced with a new one. (Do not reuse it.)

5.
Install the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")

    Transmission Gear Oil. General information

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