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1. SPECIFICATION

DG20DD

Model name WM6F1

Overall length 370 mm

Distance between shafts 205 mm / 70 mm

Weight (except transmission fluid) 62 kgf (2WD) / 63 kgf (4WD)

Gear ratio 1st 3.538 3.385 3.616

2nd 1.909 1.708 1.957

3rd 1.179 1.033 1.207

4th 0.814 0.786 0.905

5th 0.734 0.730 0.842

6th 0.628 0.595 0.714

Reverse 3.910 3.747 3.747

Synchronizer ring type

1st T: Triple-cone

2nd T: Triple-cone

3rd T: Triple-cone

4th D: Double-cone

5th D: Double-cone

6th S: Single-cone

Reverse T: Triple-cone

Shifting Type Remote (Cable type)

Gear selector lever position

Reversing: Reverse ring pull type

ItemSpecification

RemarkD20DTF D20DTF +

Low CO₂G20DF

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Item Specification Remark

Transmission fluid

Transmission fluid SAE 75W / 85, API GL-4

Capacity 1.65 L

Replacement interval EU Inspect and replenish every 60000 km (or 3 years)Normal driving condition: Fill for Life(Severe driving condition: Change every 120000 km)

GEN Inspect and replenish every 60000 km (or 4 years)Normal driving condition: Fill for Life(Severe driving condition: Change every 120000 km)

Replacement interval

DSL EU

GEN

GSL Inspect and replenish every 60000 km (or 4 years)Normal driving condition: Fill for Life(Severe driving condition: Change every 120000 km)

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2. TIGHTENING TORQUE

Part name Tightening torque Remark

1. Drive gear mounting bolt of differential carrier 166.6 to 176.4 Nm 10 EA

2. Reverse shaft mounting bolt 74.5 to 89.2 Nm

3. Transmission case mounting bolt 19.6 to 26.5 Nm 22 EA

4. Concentric slave cylinder mounting bolt 11.8 to 14.7 Nm 3 EA

5. Backup lamp switch 29.4 to 34.3 Nm

6. Neutral switch 29.4 to 34.3 Nm

7. Oil filler plug 58.8 to 78.4 Nm

8. Oil drain plug 58.8 to 78.4 Nm

9. Oil plug 58.8 to 78.4 Nm

10. Shift lever mounting nut 42.2 to 53.9 Nm

11. Selector lever mounting nut 42.2 to 53.9 Nm

12. Control shaft assembly mounting bolt 9.8 to 11.8 Nm 7 EA

13. Guide bolt 42.2 to 53.9 Nm

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Front view Rear view

1. OVERVIEWThis vehicle is equipped with WM6F1 M/T (Manual Transmission). This transmission is integrated with an axle and designed to maximize the driving performance by optimizing the gear ratio according to the engine torque.

WM6F1 M/T assembly

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1) Characteristics of WM6F1 M/T Both Forward and Reverse gears use the helical gear and are made of high-strength material.Drives the clutch with a concentric slave cylinder mounting bolt.Shifting the transmission gears is performed through the remote control cable.A pull type clutch is used for Reverse gear shifting.Features triple/double/single synchronization.

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Clutch housingTransmission caseInput shaftConcentric slave cylinderShift leverSelector leverWiring bracketNeutral switchBackup lamp switchReverse idle shaft mounting bolt

1.2.3.4.5.6.7.8.9.10.

Control guide boltOil filler plug (for servicing)Oil drain plugOil filler plug (for manufacturing)Air breatherDetent pin (for securing shift fork)Oil seal (RH)Oil seal (LH)Control housing

11.12.13.14.15.16.17.18.19.

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2) Internal Configuration

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3) Schematic Diagram

4) Gear Ratio

Item

Speed gear Final gear

Total gear ratio

Number of teeth Gear ratio

Number of teeth Gear ratio

Input Output Input Output

1st 13 46 3.538

13 59 4.538

16.059

2nd 22 42 1.909 8.664

3rd 28 33 1.179 5.349

4th 43 35 0.814 3.694

5th 38 28 0.737

15 59 3.933

2.898

6th 43 27 0.628 2.47

Reverse13 17

3.91 15.37724 36

One input gear is used for 1st forward driving and back-up driving.One input gear is used for 4th and 6th forward driving.

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2. POWER FLOWS

1st speed gear

2nd speed gear 3rd speed gear

Sectional view of WM6F1 M/T

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Reverse gear

4th speed gear 5th speed gear

6th speed gear

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3. SHIFTING MECHANISM

Control shaft

Shift lever Selector lever

5th/6th speed gear shift lug

Reverse gear shift fork

5th/6th speed gear shift fork

5th/6th speed gear & Reverse shift rail

1st/2nd speed gear shift fork

3rd/4th speed gear shift fork

1st/2nd, 3rd/4th speed gear shift rail

3rd/4th speed gear shift lug