Complete overhaul set of frictions, steels, gaskets and seals for rebuilding the A4CF0 four-speed automatic in Hyundai i10 and Kia Picanto.
A Hyundai i10 or Kia Picanto (sold as the Morning in some markets) with the small 1.1L or 1.2L engine and the four-speed automatic that slips on the 1-2 shift, flares between gears, or takes a long pause before it grabs Drive on a cold start has usually worn out its clutch packs and hardened its seals. This master rebuild kit is the full consumable package for overhauling that gearbox, the Hyundai-Kia A4CF0. The listing references kit T25900A, which bundles the overhaul seal and gasket kit T25902A with the friction plate kit T259080A and the steel plate kit T259081A, so frictions, steels and sealing parts arrive together instead of as three separate orders.
The A4CF0 is the smallest member of the Hyundai-Kia A4CF family, a front-drive four-speed with a torque converter and planetary gearsets, built for city cars with engines up to 1.2 liters and about 125 Nm of torque. Gearboxlist dates it to 2007 and lists the i10 (PA and IA generations) and the Picanto (SA, TA and JA generations) among its applications. Its gear ratios (2.919, 1.551, 1.000, 0.713) are shared with the larger A4CF1; the difference shows up in the final drive (4.336 in a 2012 Picanto 1.2 against 3.849 in a 1.4L A4CF1 car). Inside, each gear is held by a clutch pack that line pressure clamps through a rubber-sealed piston. When the friction facings glaze or the piston seals harden, the pack slips even though the valve body is asking for the right gear. A master kit renews every friction facing, every steel, and the gaskets, lip seals and sealing rings the oil passes on its way to those pistons.
The A4CF0 is also known for electrical complaints. Gearboxlist singles out the shaft speed sensors and the fluid temperature sensor, and notes that the unit can drop into limp mode in damp or cold weather. Those faults can look like a mechanical failure without any clutch damage at all.
Before you buy a full kit, scan the transmission control unit for sensor and solenoid codes and check the fluid level and condition. Our ATF color and smell chart helps you read what is in the pan, and the flare versus slip guide explains how to tell a timing or pressure problem from worn frictions. If speed sensor or temperature sensor codes are stored, fix those first and drive the car again. If the unit still slips with clean signals and full fluid, the clutch packs are the likely cause and an overhaul is the honest repair.
The listing covers the A4CF0 in the Hyundai i10 1.1L and 1.2L and the Kia Morning / Picanto from 2007 on. Most of these cars were sold outside North America, so check the transmission code on the case tag or in your service records before you order. Do not assume a bigger-engine car uses this unit: the A4CF1 behind the 1.4L and 1.6L engines and the A4CF2 behind the 2.0L are separate kits, and the listing warns that plate counts differ. Also note that some later Picanto models dropped the four-speed automatic for a five-speed automated manual, which this kit does not fit. If you are unsure, send us your year and VIN before ordering. You can browse the rest of our transmission rebuild kits if your tag reads something else.
Strip the unit, wash every drum, and inspect the bushings, thrust washers and planetary gears; the kit carries soft parts only, not hard parts, bushings or a converter. Soak the new frictions in clean fluid before stacking them, then measure each pack's clearance with a blade feeler gauge and correct it to the service manual figure rather than trusting the stack height out of the box. A clutch spring compressor makes the return spring snap rings far easier to handle. Check input shaft end play during assembly; our thrust washer and end play guide covers the method. Refill with the fluid Hyundai specifies for this unit, which gearboxlist lists as Hyundai ATF SP-III with roughly 6.1 liters total capacity, and confirm the level hot on the dipstick. After the rebuild, clear adaptive values and let the control unit relearn shift timing over several gentle drive cycles.
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No. The A4CF0 sits behind the 1.1L and 1.2L engines. Cars with the 1.4L or 1.6L normally use the A4CF1, which takes a different kit. Check the transmission code on the case or send us your year and VIN.
Hyundai ATF SP-III is the fluid listed for the A4CF0, with a total capacity of about 6.1 liters. Set the final level with the fluid hot and the engine running.
The listing describes the overhaul kit, friction plate kit and steel plate kit only. Plan on sourcing bushings, any worn hard parts and the converter separately after you inspect the unit.
Not necessarily. The A4CF0 is known for speed sensor and fluid temperature sensor faults that trigger limp mode without clutch damage. Read the codes and test the sensors and wiring first; rebuild only if it still slips with good signals.
Yes. Clear the stored adaptive values with a scan tool and drive the car through light and moderate throttle shifts so the control unit can relearn clutch fill times for the new frictions.
