Hyundai Elantra CN7: Dual Clutch Transmission Assembly

Seventh generation (CN7; 2021–2024) / Hyundai Elantra CN7 2021-2024 Workshop Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Assembly

DCT (Dual Clutch Transmission)

Components and components location

Components

1. DCT (Dual Clutch Transmission) assembly 2. DCT support bracket	3. Roll rod support bracket

Repair procedures

Removal

1.	Turn ignition switch OFF and disconnect the battery negative (-) terminal.

2.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechnical System - "Air Cleaner")

3.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

4.	Disconnect the input speed sensor connector (A) and TCM connector (B) and then loosening the bolts and then remove ground line (C).

5.	Disconnect the inhibitor switch connector (A) and then loosening the bolts and then remove the wiring bracket (B).

6.	Loosen the bolts and then remove the ground line (A).

7.	Disconnect the gear actuator connector (A).

Loosen the bolts and then remove the wiring bracket (A).

Tightening torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Remove the shift cable and cable bracket (C) after loosening the bolt (A) and nuts (B).

Tightening torque :

(A) : 19.6 - 26.5 N.m (2.0 - 2.7 kgf.m, 14.5 - 19.5 lb-ft)

(B) : 9.8 - 13.7 N.m (1.0 - 1.4 kgf.m, 7.2 - 10.1 lb-ft)

10.

Loosen the bolts and then remove the wiring bracket (A).

Tightening torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

11.

Loosen the starter upper mounting bolts (A) and transmission upper mounting bolts (B).

Tightening torque :

(A) 49.0 - 63.7 N.m (5.0 - 6.5 kgf.m, 36.2 - 47.0 lb-ft)

(B) 42.2 - 53.9 N.m (4.3 - 5.5 kgf.m, 31.1 - 39.8 lb-ft)

12.	Assemble the engine support fixture use a (Beam SST No.: 09200 - 3N000, Adapter SST No.: 09200-4X000, Engine fixture adapter (rear) SST No.: 09200-L1100, Engine fixture adapter (front) SST No.: 09200-L1200.

13.	Using the engine support fixture(A), hold the engine and transaxle assembly safely.

14.	Remove the dust cover (A).

15.

Remove the transaxle mounting bracket bolts (A).

Tightening torque :

107.9 - 127.5 N.m (11.0 - 13.0 kgf.m, 79.6 - 94.0 lb-ft)

16.

Remove the transmission support bracket (A) after loosening the mounting bolts.

Tightening torque :

58.8 - 78.5 N.m (6.0 - 8.0 kgf.m, 43.4 - 57.9 lb-ft)

17.	Remove the engine room under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")

18.

Remove the intercooler inlet pipe bracket (A).

Tightening torque :

6.9 - 10.8 N.m (0.7 - 1.1 kgf.m, 5.1 - 8.0 lb-ft)

19.

Loosen the starter lower mounting bolts (A).

Tightening torque :

49.0 - 63.7 N.m (5.0 - 6.5 kgf.m, 36.2 - 47.0 lb-ft)

20.	Remove the sub frame. (Refer to Suspension System - "Sub Frame")

21.

Remove the roll rod mounting support bracket (A).

Tightening torque :

49.0 - 68.6 N.m (5.0 - 7.0 kgf.m, 36.2 - 50.6 lb-ft)

22.	Remove the front drive shaft assembly. (Refer to Driveshaft and Axle - "Front Driveshaft")

23.	Support the transmission safely by using the jack.

24.

Loosen the transmission lower mounting bolts (A, B).

Tightening torque :

(A) 42.2 - 48.1 N.m (4.3 - 4.9 kgf.m, 31.1 - 35.4 lb-ft)

(B) 42.2 - 53.9 N.m (4.3 - 5.5 kgf.m, 31.1 - 39.8 lb-ft)

25.

After separating the transmission from the engine, remove the transmission by lowering the jack slowly.

•	Be careful not to damage other nearby systems or parts when removing the transmission assembly.

Installation

To install, reverse the removal procedure.

Matters that require attention when installing the dual clutch transmission (DCT) to engine

1)	Check the pilot bearing (B) and external damper (A) on the side of engine for any dents, damages and deformations before installing the DCT.

2)	Align the external damper spline (A) with the dual clutch spline (B).

3)	Assemble the DCT (A) to the knock bushing on the engine side (B) and then insert the input shaft to the engine pilot bearing.

After adhering the DCT with engine by pushing the DCT, tighten the mounting bolts after checking that there is no gap (less than 2mm) between the clutch housing and the engine block.

(If the bolt is tightened while there is a gap, then the spline of external damper or clutch will be damaged or broken.)

Follow the separated each procedure as below according to reinstallation or replacing with a new dual clutch transmission.

In case of the reinstallation

1.	If the differential oil seal is damaged and oil is leaking, replace the oil seal with a new one. When installing the new oil seal, use the special tool (09453-3L240, 09231-H1100).

2.	After installing the DCT, check the oil level after refilling the DCT with oil. (Refer to DCT (Dual Clutch Transmission) System - "Transmission Gear Oil")

3.	Clear the diagnostic trouble codes (DTC) using the diagnostic tool. Even though disconnecting the battery negative terminal, the DTCs will not be cleared. So, be sure to clear the DTCs using the diagnostic tool.

In case of the replacing with a new dual clutch transmission.

1.	After replacing the new DCT, it need not oil refill & level check procedure because oil is already filled with specified quantity inside new DCT.

2.	Clear the diagnostic trouble codes (DTC) using the diagnostic tool. Even though disconnecting the battery negative terminal, the DTCs will not be cleared. So, be sure to clear the DTCs using the diagnostic tool.

Perform clutch characteristics input procedure using the diagnostic tool. (One of two procedure must be performed.)

1)	Clutch compensation value setting.

2)	Clutch touch point learning.

Transmission Gear Oil

General information

General Information

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).

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.

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")

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

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)

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")

Troubleshooting

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