🔧 Transmission Fluid - Drain and Refill

On your Explorer, the automatic transmission fluid should be serviced with the correct low-viscosity ATF and the final level checked at the proper fluid temperature. Some units have a drain plug; others require pan removal, so I’ve included both paths below.

Difficulty Level: Intermediate | Estimated Time: 2-3 hours

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⚠️ Safety & Precautions

• Let the exhaust and transmission cool before starting.
• Work on level ground. Fluid level checking depends on a level vehicle.
• Use jack stands. Never rely on a floor jack alone.
• Keep dirt out of the transmission. Clean around the fill and drain areas first.
• If equipped with an electronic parking brake, set it normally before lifting.
• No battery disconnect is required for a basic fluid service.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan
• Funnel with long hose
• Fluid transfer pump
• 8mm socket
• 10mm socket
• Ratchet
• Torque wrench
• Trim tool
• Scan tool or thermometer
• Plastic scraper
• Torque bit set
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Automatic transmission fluid (MERCON LV) - Qty: 8 quarts
• Transmission pan gasket - Qty: 1
• Transmission filter - Qty: 1
• Transmission pan drain plug seal - Qty: 1
• Transmission pan bolts - Qty: 1 set

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Warm the vehicle slightly first if the transmission fluid is cold. Do not service it hot.
• Have the new fluid ready before opening the system.
• Keep everything clean.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the vehicle

• Use the floor jack to lift the Explorer at the correct lift points.
• Support it with jack stands and chock the rear wheels.
• Make sure the vehicle sits level side-to-side.

Step 2: Remove the underbody shield

• Use the 8mm socket and ratchet to remove the splash shield fasteners.
• Set the shield and fasteners aside in order.

Step 3: Drain the transmission fluid

• If equipped with a drain plug: Place the drain pan under the transmission and remove the drain plug with the correct socket or torque bit.
• If no drain plug is present: Use the 10mm socket to remove the pan bolts, leaving a few loose at one end until the fluid starts to drain.
• Let the fluid drain fully.

Step 4: Remove the pan and filter

• Use the 10mm socket to remove the remaining pan bolts.
• Lower the pan carefully and pour out the remaining fluid.
• Remove the old transmission filter with your hands or a gentle pull.

Step 5: Clean and inspect

• Use a plastic scraper and shop towels to clean the pan mating surface.
• Clean the pan and magnet if equipped.
• Check for metal buildup. A light gray paste is normal; chunks are not.
• Do not scratch the sealing surface.

Step 6: Install the new filter and pan

• Push the new transmission filter into place.
• Install the new transmission pan gasket.
• Raise the pan and start all bolts by hand with the 10mm socket.
• Torque to 10 Nm (89 ft-lbs) for the pan bolts, unless your pan label or service data shows a different spec.

Step 7: Refill with fresh fluid

• Lower the vehicle level.
• Use a funnel with long hose or fluid transfer pump to add MERCON LV through the fill location.
• Add about 5 quarts first, then add more slowly after the initial fill.

Step 8: Circulate the fluid

• Start the engine and let it idle.
• With your foot on the brake, move the shifter through each gear position for a few seconds.
• Return to Park.

Step 9: Set the final fluid level

• Use a scan tool or thermometer to monitor transmission fluid temperature.
• At the correct service temperature, add fluid slowly until it reaches the proper level per the fill/check procedure.
• Do not overfill. Extra fluid can cause aeration and shifting problems.
• Check level only at the correct temperature.

Step 10: Reinstall the shield and lower the vehicle

• Reinstall the splash shield with the 8mm socket.
• Lower the vehicle from the jack stands.

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✅ After Repair

• Start the engine and check underneath for leaks.
• Road test the Explorer and confirm smooth shifts.
• Recheck the fluid level if the service procedure calls for a hot check after the test drive.
• If shift quality feels abnormal, verify the fluid level again before driving farther.

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💰 DIY vs Shop Cost

Shop Cost: $220-$380 (parts + labor)

DIY Cost: $75-$140 (parts only)

You Save: $145-$240 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 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.