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4WD:EST

Optimal performance under the slippery road or off-road conditions

Stable and safe off-road driving with 4WD

HYUNDAI TRANSYS EST(Part-time transfer case) is equipped with the originally designed 1-cam 2-shift structure switching unit for improved prompt response. Safe driving is guaranteed by a simple and quick touch of the switch to change the driving mode when the road suddenly becomes rough.

4WD low mode offers improved pulling capacity and enables safe escape from rough roads. It achieved less-noise and more-efficient performances with the know-how of planetary gear designs. 4WD SUV and MPV vehicles ensure safe driving under extreme off-road conditions and better pulling capacity even with heavy loading. CAN communication EST(Part-time transfer case) controls are equipped with a control logic system to protect driving systems when drivers misuse vehicles.

  • Key Feature 1

    Switching unit response improvement

    1 CAM 2 SHIFT (w/ Synchronizer)

  • Key Feature 2

    Low noise designs

    Helical planetary gear & silent chain application

  • Key Feature 3

    Originally designed control unit

    CAN communication & driving system protection logic application

Rear-wheel 4WD vehicle EST (E2R170)

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01

Helical planetary gear

4L Mode (R2.54/R2.72

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
02

1-cam 2-shift system

Transfer response improvement with the 2H4H4L transfer mode

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
03

Silent chain

Low noise chain and planetary gear implementation

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
04

Synchronizer

2H4H transfer function application

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
05

Shifting motor

Position sensor design

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
06

Transfer Case Control Unit (TCCU)

Motor position control and logic and circuit designs
Bi-material tire application sensor

4WD delivers driving force to all four wheels and the power from the engine is distributed to the front and rear wheels via a transfer case. HYUNDAI TRANSYS developed EST(Part-time transfer case) for light and quiet driving experience.
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Applicable specification

Application model : Patriot, B40, Light Tactical Vehicle

Maximum input torque

TORQUE
Nm

1,177~2,050

Gear ratio

Gear ratio
1st/Top

2.54

  • 4WDEST

    Four-Wheel
    Drive

  • EST2-speed

    • ㆍE2R120
    • ㆍE2R170
    • ㆍE2R190
  • EST1-speed

    • ㆍE1R170