transmission
Transmission Fluid Change
for 2015 Kia Forte 1.8L I4 · FWD
Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Mechanic · 20+ years
Difficulty
Easy
Time
48 min
Tools
11
Steps
9
✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.
Drain and refill the automatic transmission fluid to maintain proper lubrication and shifting performance.
Warnings
⚠Transmission fluid can be extremely hot after driving. Allow vehicle to cool for at least 1 hour before starting work.
⚠Never mix different ATF types. Only use Kia SP-IV-M or equivalent specification fluid.
ℹ️This is a drain and refill procedure, not a complete flush. Approximately 4-5 quarts will drain; total system capacity is 10 quarts.
⚠️Ensure vehicle is securely supported on jack stands. Never work under a vehicle supported only by a floor jack.
Tools required
17mm socketEssential
10mm socketEssential
Torque wrenchEssential
Floor jackEssential
Jack standsEssential
Drain pan (minimum 6 quart capacity)Essential
Funnel with long neckEssential
Ratchet and extensionEssential
Shop ragsEssential
Gloves (chemical resistant)Essential
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Parts
- Transmission drain plug crush washer × 1 — Use OEM specification
- Transmission pan gasket × 1 — Use OEM specification
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Fluids
- Kia SP-IV-M ATF — 4.5 qt
Preparation
- Park vehicle on level surface and engage parking brake
- Allow engine and transmission to cool for at least 1 hour if recently driven
- Raise front of vehicle with floor jack and secure on jack stands at manufacturer-specified jack points
- Remove plastic engine under cover if equipped using 10mm socket
- Locate transmission drain plug on bottom of transmission pan and transmission pan bolts
- Verify you have correct Kia SP-IV-M ATF fluid before starting
Procedure
- 1Drain transmission fluid via drain plugPosition drain pan under transmission drain plug. Using 17mm socket, slowly loosen the drain plug. Allow fluid to drain completely into pan for approximately 10-15 minutes. Once drained, remove and inspect the old crush washer on the drain plug.
- 2Reinstall drain plug with new crush washerRemove old crush washer from drain plug and discard. Install new crush washer onto drain plug. Thread drain plug by hand to avoid cross-threading, then torque to specification using torque wrench.Torque specTransmission Drain Plug30 Nm (22 lb-ft)
- 3Remove transmission pan boltsUsing 10mm socket, loosen all transmission pan bolts in a criss-cross pattern, working from outside to center. Leave two bolts on opposite corners partially threaded to support pan weight. Carefully lower pan while supporting it to prevent spilling residual fluid.
- 4Remove transmission pan and filterOnce all fluid has drained from pan, fully remove remaining bolts and lower pan carefully. Remove old gasket material from pan and transmission mating surface using plastic scraper. Inspect internal transmission filter; remove and replace if serviceable (some models have non-serviceable internal filter).
- 5Clean and prepare panThoroughly clean transmission pan interior and exterior with clean shop rags. Inspect pan for metal debris or damage to magnet. Clean magnet thoroughly. Ensure all old gasket material is removed from pan sealing surface.
- 6Install new gasket and reinstall panPosition new transmission pan gasket on pan, ensuring proper alignment with all bolt holes. Carefully raise pan into position on transmission. Hand-thread all pan bolts to prevent cross-threading. Tighten bolts in criss-cross pattern from center outward to specification using torque wrench.Torque specPan Bolts15 Nm (11 lb-ft)
- 7Refill transmission with ATFLocate transmission dipstick tube at rear of engine bay. Insert long-neck funnel into dipstick tube. Add 4 quarts of Kia SP-IV-M ATF fluid slowly. Wait for fluid to settle, then add additional fluid in 0.5 quart increments. Start with approximately 4.5 quarts total.
- 8Check fluid level (cold)With engine still off, check transmission fluid level on dipstick. Fluid should be in COLD range. Add fluid as needed to bring level to upper COLD mark. Do not overfill.
- 9Warm up transmission and verify levelStart engine and allow to idle. With foot on brake, shift through all gear positions (P-R-N-D-L) pausing 3 seconds in each position. Return to Park. Allow engine to reach normal operating temperature (approximately 5-10 minutes). Check fluid level on dipstick with engine running. Fluid should be in HOT range. Add fluid as needed to reach upper HOT mark.
Reassembly
- Reinstall plastic engine under cover if removed
- Lower vehicle from jack stands
- Dispose of used ATF fluid properly at recycling center
Verification
- Check for leaks around drain plug and transmission pan after warming engine
- Verify transmission fluid level is in proper HOT range with engine running and at operating temperature
- Test drive vehicle and verify smooth shifting through all gears
- Recheck fluid level after test drive and top off if necessary
- Monitor for leaks over the next few days of driving
Related trouble codes on this vehicle
Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.
P0218Transmission Over Temperature ConditionP0700Transmission Control System (MIL Request)P0701Transmission Control System Range/PerformanceP0710Transmission Fluid Temperature Sensor CircuitP0711Transmission Fluid Temperature Sensor Range/PerformanceP0730Incorrect Gear RatioP0750Shift Solenoid AP0751Shift Solenoid A Performance/Stuck OffP0760Shift Solenoid CP0765Shift Solenoid DP0770Shift Solenoid EP2700Transmission Friction Element A Apply Time Range/Performance
Chasing one of these codes and not sure which part is guilty? Ask a master mechanic about YOUR car →