2018 Kia Optima Automatic Transmission Parts

This table covers the Case covers. Read more

This group shows a single part: HYUNDAI 452803B851.

This table covers the gaskets that seal the Case. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: VAICO V520325.

This table covers the clutch-plate packs inside the transmission or transfer case. Read more

RAYBESTOS POWERTRAIN supplies the 4 Clutch Plate Pack parts for the 2018 Kia Optima.

The Friction Plate Pack section lists 3 options from RAYBESTOS POWERTRAIN — grouped under the catalog's "Friction Plate Pack" designation — the notes column spells out what sets them apart. RAYBESTOS POWERTRAIN FRMHYUND07 is listed in this group.

In the Steel Plate Pack grade, RAYBESTOS POWERTRAIN supplies 1 part: grouped under the catalog's "Steel Plate Pack" designation — the notes column spells out what sets them apart. A representative part number is RAYBESTOS POWERTRAIN STMHYUND07.

Part numbers include RAYBESTOS POWERTRAIN FRMHYUND07, RAYBESTOS POWERTRAIN FRMHYUND10 and RAYBESTOS POWERTRAIN RHT96303, among others listed above.

This table covers the Conductor plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts. Read more

This group shows a single part: ACKOJA A52770039.

This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for. Read more

12 Filter parts are listed for the 2018 Kia Optima, from ATP, BECK/ARNLEY, RAYBESTOS POWERTRAIN and 2 other brands. ATP B205 carries the "Popular" badge. 1 part fits every engine; the other 11 are engine-specific.

This table covers the flexplates that connect the crankshaft to the torque converter. Read more

2 Flexplate parts for the 2018 Kia Optima come from 2 brands — ATP and PIONEER.

This group includes ATP Z520 and PIONEER FRA598.

This table covers the heat exchangers that cool transmission fluid. Typical signs include fluid that overheats, a leak at the cooler fittings, or milky fluid that says coolant and ATF have mixed. Flush the lines when you replace a cooler. Cross-contamination is how a small leak becomes a transmission job. Read more

One part is listed for the 2018 Kia Optima — DORMAN 918531.

This table covers the Fluid Cooler Line hoses. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

One part is listed for the 2018 Kia Optima — SUNSONG 5827057.

This table covers the pans that hold automatic-transmission fluid. Read more

2 Fluid Pan parts for the 2018 Kia Optima come from SKP. 1 part fits every engine; the other 1 is engine-specific.

Listed part numbers: SKP SK2803850 and SKP SK2803600.

This table covers the Fluid Pump bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

One part is listed for the 2018 Kia Optima — DURA-BOND MIT21T.

This table covers the Fluid temperature sensors. Typical signs include hard cold starts, a fan that never comes on, or a gauge that disagrees with the scan tool. A sensor that reads open or shorted is usually the part; an implausible-but-smooth reading can be wiring. Read more

2 Fluid Temperature Sensor parts are listed for the 2018 Kia Optima, from GPD and STANDARD MOTOR PRODUCTS. All of them fit every engine offered in the 2018 Optima.

Part numbers include GPD 1814541 and STANDARD MOTOR PRODUCTS TX300.

This table covers the seals at the Manual Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Manual Shaft Seal parts for the 2018 Kia Optima come from 2 brands — NATIONAL and WJB / INMOTION PARTS.

Listed part numbers: NATIONAL 711014 and WJB / INMOTION PARTS WS711014.

This table covers the wear sleeves used to restore a Output Shaft seal surface. Read more

6 Output Shaft Repair Sleeve parts are listed for the 2018 Kia Optima, from BCA, NATIONAL and WJB / INMOTION PARTS.

Listed part numbers: BCA NS99145, BCA NS99157 and NATIONAL 99145, plus the other parts above.

This table covers the seals at the Output Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

12 Output Shaft Seal parts are listed for the 2018 Kia Optima, from NATIONAL, WJB / INMOTION PARTS, HYUNDAI and 2 other brands. NATIONAL 711013 carries the "Popular" badge.

This table covers the Pressure Control (EPC) solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

One part is listed for the 2018 Kia Optima — WELLS 2N1275.

This table covers the Shift Improvement kits. Read more

One part is listed for the 2018 Kia Optima — TRANSGO SKA6MF.

This table covers the Shift solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

4 Shift Solenoid parts for the 2018 Kia Optima come from ACKOJA.

Listed part numbers: ACKOJA A52770055, ACKOJA A52770059 and ACKOJA A52770022, plus the other parts above.

This table covers the seals at the Torque Converter Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

5 Torque Converter Shaft Seal parts for the 2018 Kia Optima come from 5 brands — NATIONAL, BCA, JAPANESE OE and 2 other brands. The "Popular" part is NATIONAL 710615.

Part numbers include NATIONAL 710615, BCA NS710615 and JAPANESE OE 9031143004, among others listed above.

This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid. Read more

20 Transmission Fluid parts are listed for the 2018 Kia Optima, from VALVOLINE, LIQUI MOLY, PENTOSIN and 6 other brands. ACDELCO 109243 carries the "Popular" badge. 3 parts fit every engine; the other 17 are engine-specific.

The ATF 64 section lists 2 options from PENTOSIN — grouped under the catalog's "ATF 64" designation — the notes column spells out what sets them apart. PENTOSIN 1058113 is listed in this group.

In the Dexron grade, ACDELCO supplies 1 part: grouped under the catalog's "Dexron" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 109243.

The Dual Clutch section lists 1 option from PENTOSIN — grouped under the catalog's "Dual Clutch" designation — the notes column spells out what sets them apart. PENTOSIN 1052208 is listed in this group.

In the Multi-Vehicle grade, VALVOLINE, LIQUI MOLY, MOBIL and 1 other brand supply 8 parts: grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. A representative part number is MOBIL 126505.

The SP-IV (SP 4) section lists 2 options from AISIN and IDEMITSU — grouped under the catalog's "SP-IV (SP 4)" designation — the notes column spells out what sets them apart. AISIN ATFSP4 is listed in this group.

In the ZF Fluid grade, ZF supplies 2 parts: grouped under the catalog's "ZF Fluid" designation — the notes column spells out what sets them apart. A representative part number is ZF 0671090534.

4 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the conditioners and additives used with this transmission fluid. Read more

LUBEGARD supplies the 7 Transmission Fluid Additive parts for the 2018 Kia Optima. LUBEGARD 63010 carries the "Popular" badge. 3 parts fit every engine; the other 4 are engine-specific.

Listed part numbers: LUBEGARD 63010, LUBEGARD 19610 and LUBEGARD 63016, plus the other parts above.

This table covers the mounts that hold the transmission to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

5 Transmission Mount parts for the 2018 Kia Optima come from 4 brands — WESTAR, SKP, ANCHOR and 1 other brand.

The Economy section lists 1 option from SKP — the catalog's value-priced group. SKP SK10059 is listed in this group.

In the Standard Replacement grade, ANCHOR, DEA / MARMON RIDE CONTROL and WESTAR supply 3 parts: built to original-equipment specification. A representative part number is ANCHOR 10059.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include SKP SK10059, ANCHOR 10059 and DEA / MARMON RIDE CONTROL A71099, among others listed above.