Hyundai Elantra (CN7): Dual Clutch Transmission Assembly / Transmission Gear Oil

Hyundai Elantra (CN7) 2021-2025 Service Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Assembly / Transmission Gear Oil

General information

General Information
1.
Check & Change intervals
Check & Replenishmen
Change 
Capacity
Oil specification
Normal Use
Severe Use
No check
 No service required
120000 km
(80000 miles)
1.6 - 1.7L
(0.42 - 0.45 U.S.gal., 1.69 - 1.80 U.S. qt., 1.41 - 1.50 lmp qt)
API Service GL-4, SAE 70W
• Recommended oil
–
H.K.SHELL : SPIRAX S6 GHDE 70W DCTF PLUS
–
SK : HK D DCTF TGO-10 PLUS

   
Severe usage is defined as
•
Frequent driving on rough road (Bumpy road, gravel road, snow road, unpaved road. etc.)
•
Frequent driving on mountain road, ascent/descent.
•
Driving for patrol, taxi, commercial car or vehicle towing.
•
Frequent driving under high speed (over 170km)
•
More than 50% driving in heavy city traffic during hot weather above 32°C (90°F)
•
driving in areas using salt or other corrosive materials or in very cold weather.
•
Towing a trailer or using a camper on roof rack.
•
Manual transmission oil should be changed any time.
Manual transmission have been submerged in water.

Repair procedures

Inspection
   
•
In principle, the transmission oil is maintenance-free, and no exchange is required.
1.
Uplift the vehicle with lift.
2.
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
3.
Loosen the oil filler plug (A).

4.
Check the 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.
5.
Install the filler plug (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.)

6.
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:
•
Frequent driving on rough road (Bumpy road, gravel road, snow road, unpaved road. etc.)
•
Frequent driving on mountain road, ascent/descent.
•
Driving for patrol, taxi, commercial car or vehicle towing.
•
Frequent driving under high speed (over 170km)
•
More than 50% driving in heavy city traffic during hot weather above 32°C (90°F)
•
driving in areas using salt or other corrosive materials or in very cold weather.
•
Towing a trailer or using a camper on roof rack.
•
Manual transmission oil should be changed any time.
Manual transmission have been submerged in water.
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 ~ 48.8 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 - 1.7L (0.42 - 0.45 U.S.gal., 1.69 - 1.80 U.S. qt., 1.41 - 1.50 lmp qt)

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")

    Components and components location Components1. DCT (Dual Clutch Transmission) assembly2. DCT support bracket3. Roll rod support bracket Repair procedures Removal1.

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