Kia Telluride DIY Maintenance Guide (3.8L V6, AWD, 8-Speed Auto)

The Kia Telluride launched in 2020 and immediately became the benchmark for family three-row SUVs — reliable, spacious, and well-engineered. But "reliable" doesn't mean "maintenance-free." The Telluride has several service requirements that get missed at dealerships, particularly the AWD rear clutch pack fluid and the 8-speed transmission service at higher mileage.

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Engine: 3.8L Lambda II V6

Naturally aspirated V6, 291 hp, 262 lb-ft torque.

Oil spec: SAE 5W-20 full synthetic (API SP) Capacity: 6.6 quarts with filter Filter: Kia 26300-3C100 or Mobil M1-108 Drain plug torque: 26 ft-lbs Interval: 5,000–7,500 miles (use 5,000-mile hard intervals if you tow)

DIY cost: $50–$75 | Dealer cost: $90–$140

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8-Speed Automatic Transmission (A8LF3)

Fluid spec: Kia Genuine ATF SP-IV-RR — important distinction from older SP-IV; the SP-IV-RR has revised friction modifiers for the A8LF3 clutch pack Capacity: 9.8 quarts total; approximately 5.8 quarts drain-and-fill Service interval: 60,000 miles normal; 30,000 miles if towing Drain plug torque: 22 ft-lbs

DIY cost: $75–$110 | Dealer cost: $280–$450

For the complete procedure, see our transmission fluid guide.

<table> <thead> <tr> <th>Service</th> <th>Fluid Spec</th> <th>DIY Capacity</th> <th>DIY Cost</th> <th>Dealer Cost</th> </tr> </thead> <tbody> <tr> <td>8-speed ATF (drain-and-fill)</td> <td>SP-IV-RR</td> <td>5.8 qt</td> <td>$75–$110</td> <td>$280–$450</td> </tr> <tr> <td>AWD rear diff/clutch fluid</td> <td>Kia SP-IV M</td> <td>0.8 qt</td> <td>$20–$35</td> <td>$100–$165</td> </tr> </tbody> </table>

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AWD Rear Differential and Clutch Pack Fluid

This is the most overlooked service on the Telluride — and the most expensive failure mode if neglected.

The Telluride AWD uses a rear electronically-controlled clutch pack. This housing contains its own fluid that degrades independently of the transmission.

Fluid spec: Kia Genuine AWD Fluid (SP-IV M type — Hyundai part #02100-00210) Capacity: 0.8 quarts Service interval: 30,000 miles — binding on turns or AWD hesitation = degraded fluid Fill plug torque: 22 ft-lbs

DIY cost: $20–$35 | Dealer cost: $100–$165

Full procedure in our differential fluid guide.

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Spark Plugs

Rear bank plugs (cylinders 1, 3, 5) require removing the upper intake plenum — an intermediate DIY job.

OEM spec: NGK SILZKR8B8S laser iridium Torque: 15 ft-lbs Interval: 60,000 miles Plug count: 6

DIY cost: $55–$80 for a set of 6 | Dealer cost: $200–$320

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Air and Cabin Filters

Engine air filter: 4 clips, driver-side rear of engine bay. OEM Kia 28113-S9100 or K&N 33-5060. Interval: 20,000–30,000 miles.

Cabin air filter: Behind glove box — press sides inward. DIY: $15–$30 vs. dealer $60–$95.

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What to Watch for at 50,000 Miles

1. VCM Actuator Failure (P2004/P2006): Variable Charge Motion actuators on the intake manifold can fail mechanically, causing rough idle and a CEL. Fix: actuator replacement ($200–$350 parts). Diagnose with an OBD2 scanner — see our OBD2 codes guide.

2. AWD Fluid Degradation: Binding on turns or AWD hesitation at 40,000+ miles is almost always the rear clutch pack fluid. Change it before you have symptoms.

3. GDI Carbon Buildup (longer term): The 3.8L Lambda II uses GDI. Carbon will accumulate on intake valves around 60,000–80,000 miles. Plan for walnut blast service. See fuel system cleaning guide.

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Coolant Service

Coolant spec: Kia Genuine Long-Life Coolant (OAT — pink/red) First change: 5 years or 60,000 miles Capacity: 9.7 quarts

Full procedure in our coolant flush guide.

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Full Maintenance Cost Comparison

<table> <thead> <tr> <th>Service</th> <th>Interval</th> <th>DIY Cost</th> <th>Dealer Cost</th> <th>Savings</th> </tr> </thead> <tbody> <tr> <td>Oil change (V6)</td> <td>7,500 mi</td> <td>$50–$75</td> <td>$90–$140</td> <td>$40–$65</td> </tr> <tr> <td>8-speed ATF</td> <td>60,000 mi</td> <td>$75–$110</td> <td>$280–$450</td> <td>$205–$340</td> </tr> <tr> <td>AWD diff/clutch fluid</td> <td>30,000 mi</td> <td>$20–$35</td> <td>$100–$165</td> <td>$80–$130</td> </tr> <tr> <td>Spark plugs (x6)</td> <td>60,000 mi</td> <td>$55–$80</td> <td>$200–$320</td> <td>$145–$240</td> </tr> <tr> <td>Coolant flush</td> <td>60,000 mi</td> <td>$25–$45</td> <td>$120–$180</td> <td>$95–$135</td> </tr> </tbody> </table>

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Bottom Line

The AWD rear clutch pack fluid at 30,000 miles and the 8-speed ATF at 60,000 miles are the two services most likely to cause expensive failures if skipped. Both are simple drain-and-fill jobs that take under an hour. Do them on schedule and the Telluride's Lambda II V6 should comfortably reach 200,000 miles.

Ready to tackle these services yourself? Get the DIY Mechanic System — starting at $29.99/mo at OwnerDrop.