Automotive Transmission System: A4CF2 / A4CF1 Gearbox for Hyundai 1.4L

The A4CF1-2 is a four-speed, front-wheel-drive automatic transmission primarily utilized in Hyundai and Kia models with 1.4L to 2.0L engines produced from 2006 onwards. This transmission employs an electronic control system and is equipped with six solenoids, four clutch assemblies, and two brake assemblies. Its design features include a bottom-mounted valve body, a three-element torque converter, and full variable-flow hydraulic pressure control capabilities.

Description

Main Transmission Specifications
Type: 4-speed Front-Wheel Drive Automatic Transmission (A4CF1/A4CF2)
Gear Ratios: Typically includes one overdrive gear (4th gear).
Torque Converter: Three-element, two-phase, single-stage type (approx. 236 mm diameter).
Control Type: Fully electronically controlled, equipped with 6 solenoids (5 PWM solenoids and 1 VFS solenoid).
Main Components: 3 planetary gear sets, 4 clutch sets, 2 brake sets, and 1 low-speed one-way clutch.
Applicable Models: 2006 and later Kia Spectra 2.0L, 2007 and later Hyundai Elantra 2.0L, and various i20/i30 1.4L–2.0L models.

The A4CF1 and A4CF2 automatic transmissions (4-speed, FWD) used in Hyundai and Kia models typically correspond to OEM part number 45000-23150.