🔧 Tucson - Automatic Transmission Fluid Drain & Refill

On your Tucson, a “fluid change” is usually a drain-and-refill (not a full machine flush). You’ll drain the old ATF, refill with the correct Hyundai-spec fluid, then verify the level at the correct fluid temperature to prevent slipping, harsh shifts, or damage.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

---

⚠️ Safety & Precautions

• ⚠️ Work on level ground; support with jack stands before going underneath.
• ⚠️ ATF gets very hot—wear gloves and safety glasses and let it cool if needed.
• ⚠️ Keep the vehicle level while checking/filling ATF or the level will be wrong.
• ⚠️ Never crawl under a vehicle supported only by a floor jack.
• 🔋 Battery disconnect is not required for this service.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum) x2
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan (10-quart minimum)
• Metric socket set (8mm-24mm)
• 3/8" drive ratchet
• Torque wrench (10-100 Nm range)
• Flat trim tool
• Funnel with long flexible hose
• Fluid transfer pump (hand pump) (specialty)
• OBD2 scan tool that reads transmission fluid temperature (specialty)
• Infrared thermometer (optional)
• Shop rags

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Hyundai-approved ATF (SP-IV spec) - Qty: 5 quarts
• Transmission drain plug washer - Qty: 1

---

📋 Before You Begin

• Park on a level surface, apply the parking brake, and place wheel chocks behind the rear wheels.
• Warm the transmission slightly with a 10–15 minute drive so the ATF drains better (not scorching hot).
• Look under the hood and confirm: do you see a transmission dipstick (often a small yellow handle)? If yes, you can use the “Dipstick method.” If no, use the “Overflow/level plug method.”
• Set up your OBD2 scan tool so you can watch transmission fluid temperature (TFT). This matters for accurate final level.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the front of your Tucson

• Use wheel chocks at the rear wheels.
• Use a floor jack (rated 3-ton minimum) to lift the front at the proper front center jack point.
• Place jack stands (rated 3-ton minimum) under the front pinch welds or approved support points, then lower onto the stands.
• Keep it level for accurate fluid level.

Step 2: Remove the lower splash shield (if equipped)

• Use a metric socket set (8mm-24mm) and 3/8" drive ratchet to remove shield bolts.
• Use a flat trim tool to pop out plastic clips without breaking them.

Step 3: Identify fill point BEFORE you drain

• Find the transmission fill point (either a dipstick tube up top, or a side fill plug on the transmission case).
• If it’s a side fill plug, use a metric socket set (8mm-24mm) and 3/8" drive ratchet to carefully crack it loose first.
• Never drain first if you can’t refill.

Step 4: Drain the old ATF

• Place a drain pan (10-quart minimum) under the transmission drain plug.
• Use a metric socket set (8mm-24mm) and 3/8" drive ratchet to remove the drain plug.
• Let it drain until it becomes a slow drip (usually 10–20 minutes).

Step 5: Reinstall drain plug with a new washer

• Replace the drain plug washer with a new transmission drain plug washer.
• Install and tighten the drain plug using a torque wrench (10-100 Nm range).
• Torque to 39-49 Nm (29-36 ft-lbs)

Step 6: Refill with the correct ATF (initial fill)

• If using the dipstick tube: add fluid using a funnel with long flexible hose.
• If using a side fill port: pump fluid in using a fluid transfer pump (hand pump) (specialty).
• Add about the same amount you drained (commonly ~4 quarts), then you’ll fine-tune the level next.
• Wipe spills with shop rags.

Step 7: Circulate fluid through the transmission

• Start the engine and keep your foot on the brake.
• Slowly move the shifter through P-R-N-D and back, pausing ~3 seconds in each gear.
• Leave it in P with engine idling.

Step 8A: Final level check (Dipstick method — if equipped)

• With engine idling, use your OBD2 scan tool that reads transmission fluid temperature (specialty) to confirm TFT is in the normal warm range.
• Pull the dipstick, wipe it with shop rags, reinsert fully, then pull again to read.
• Add ATF in small amounts (0.25 quart at a time) using the funnel with long flexible hose until it reads at the correct “HOT” range.

Step 8B: Final level check (Overflow/level plug method — dipstickless)

• Keep the vehicle level on jack stands (rated 3-ton minimum) and the engine idling.
• Use your OBD2 scan tool that reads transmission fluid temperature (specialty) and aim for a warm check window (commonly around 50°C / 122°F).
• Locate the transmission level/overflow plug and place the drain pan (10-quart minimum) underneath.
• Carefully remove the level/overflow plug using a metric socket set (8mm-24mm) and 3/8" drive ratchet.
• If fluid barely drips: level is close.
  • Add ATF through the fill port using the fluid transfer pump (hand pump) (specialty) until you get a thin steady stream from the level opening.
• If fluid pours out hard:
  • Let it drain until it becomes a thin stream/drip, then reinstall the plug.
• Tighten the level/overflow plug using a torque wrench (10-100 Nm range).
• Torque to 15-25 Nm (11-18 ft-lbs)

Step 9: Reinstall splash shield and lower the vehicle

• Reinstall the splash shield using the metric socket set (8mm-24mm) and 3/8" drive ratchet.
• Lower the vehicle safely using the floor jack (rated 3-ton minimum).

---

✅ After Repair

• Test drive 10–15 minutes and confirm smooth shifts.
• Recheck for leaks underneath around the drain plug and any fill/level plugs.
• If you notice slipping, delayed engagement, or new harsh shifts, stop driving and re-check the level (low or overfilled ATF can cause this).

---

💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $60-$120 (parts only)

You Save: $130-$390 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.