Overhaul, friction and steel kit for the Hyundai/Kia A4AF1, A4AF2 and A4AF3 four-speed in the 1999-2011 Accent, Kia Rio, Tiburon and Elantra.
If you own a 2006-2011 Hyundai Accent or a 2005-2011 Kia Rio or Rio5 with the 1.6L and the four-speed automatic, the transmission under it is almost certainly the A4AF3. When one of these cars starts flaring between gears, slips once it is warm, or sits a beat too long before it grabs Drive, the clutch packs are usually burned and the seals are tired. This master kit gives a shop or a home rebuilder the full set of wear parts for that overhaul: an overhaul set of seals, gaskets, sealing rings and rubber rings, plus new friction plates and new steel plates. The same kit also covers the earlier A4AF1 and A4AF2 units, so a 1999-2005 Accent is included.
The A4AF3 is a small front-drive four-speed that Hyundai developed with Mitsubishi from the F4A21 design. It is rated for engines up to 1.6 liters and about 150 Nm of torque, and it uses ratios of 2.846, 1.581, 1.000 and 0.685 with a 2.176 Reverse. Each of those gears is held by a clutch pack that is applied by fluid pressure. Rebuilding one properly means renewing the frictions and steels that do the work and every seal and ring that holds the apply pressure. This kit does both in one box, and the photo shows the valve body separator gaskets and the pan and case gaskets as well, so the whole unit is resealed at the same time.
The usual chain of failure on this family is well documented. Bushings wear, oil pressure drops, the clutch packs start slipping and burning, and the debris from those clutches ends up clogging the valve body. That is why a rebuild that only swaps frictions without checking bushings tends to come back.
Scan the car first. A gear ratio code tells you the computer has seen input and output speeds that do not match the selected gear; our gear ratio code guide explains how to read P0730 through P0734. Then check the fluid level and condition hot. If the level was low, top up and retest, because a low A4AF3 can slip with healthy clutches. If the fluid is burnt and the slip is still there, the unit needs the overhaul this kit is for.
The listing covers the A4AF1, A4AF2 and A4AF3 in the 2006-2011 Accent 1.6L, the 2005-2011 Kia Rio and Rio5 1.6L, the 2001-2006 Accent 1.6L and the 1999-2003 Accent 1.5L. It also lists the 1999-2001 Tiburon 2.0L and 1999-2000 Elantra 2.0L; those 2.0L cars can carry a different case code, so read the tag on your transmission before ordering. If anything is unclear, send us your year and VIN. More kits are in our rebuild kits category.
| Transmission | Hyundai/Kia A4AF1 / A4AF2 / A4AF3 4-speed automatic |
| Fits | 1999-2011 Accent, 2005-2011 Kia Rio/Rio5, 1999-2001 Tiburon 2.0L, 1999-2000 Elantra 2.0L |
| Includes | Overhaul kit, friction plates, steel plates |
| Part number | Zun-A4AF1 A4AF2 A4AF3 |
| Weight | 6 lb |
Yes, if it has the 1.6L and the four-speed automatic. The listing covers the 2005-2011 Kia Rio and Rio5 1.6L with the A4AF3. Check the tag on the case if you want to be certain.
An overhaul set with seals, gaskets, sealing rings and rubber rings, plus new friction plates and new steel plates. Bushings, a filter and hard parts are not listed as included.
Hyundai ATF SP-III or an approved equivalent. A dry unit holds about 6.1 liters, and a pan drain only replaces about 2.5 liters, so plan more than one change to fully refresh old fluid.
The most common cause is bushing wear that lowers oil pressure. The clutch packs then slip and burn, and their debris clogs the valve body. Replacing worn bushings during the rebuild is the key to making it last.
On many models the TCM adaptive values should be reset so the shifts relearn around the new clutches. Drive gently through all gears for the first few trips.
