🔧 Ridgeline - Automatic Transmission Fluid Change

This service is a simple drain-and-refill of the 6-speed automatic transmission. It replaces only the fluid that drains from the pan; do not use a pressurized flushing machine because Honda specifies genuine Honda ATF DW-1 for this transmission.

Difficulty Level: Beginner | Estimated Time: 1-1.5 hours

Assumption: This procedure is for the stock 6-speed automatic transmission.

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⚠️ Safety & Precautions

• ⚠️ Work on a level, solid surface so the fluid level can be checked correctly.
• ⚠️ Automatic transmission fluid may be hot enough to cause burns. Wear gloves and safety glasses.
• ⚠️ Never work beneath your Ridgeline while it is supported only by a floor jack.
• ⚠️ Keep the truck level when raised. Support both front sides at equal height with jack stands.
• ⚠️ Use only Honda ATF DW-1. Do not substitute Honda CVT fluid, Honda ATF Type 3.1, or universal fluid.
• ⚠️ Do not add transmission additives or perform a pressurized flush.
• 🔋 Battery disconnection is not required.

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🔧 Required Tools

You'll need the following tools for this repair:

• 3/8-inch drive ratchet
• 3/8-inch drive torque wrench rated 10-80 ft-lbs
• Long-neck transmission funnel
• Drain pan rated 10-quart minimum
• Graduated measuring container rated 5-quart minimum
• Floor jack rated 3-ton minimum
• Jack stands rated 3-ton minimum
• Wheel chocks
• Nitrile mechanic gloves
• Safety glasses
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Honda ATF DW-1 automatic transmission fluid - Qty: 4 US quarts
• Transmission drain-plug sealing washer - Qty: 1

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📋 Before You Begin

• 🚙 Drive your Ridgeline for approximately 10-15 minutes to warm the transmission fluid.
• 🅿️ Park on level pavement, apply the parking brake, shift to Park, and switch off the engine.
• 🧱 Place wheel chocks securely behind both rear wheels.
• 📏 If additional clearance is required, raise the front with a 3-ton floor jack and support both sides equally with 3-ton jack stands. The truck must remain level.
• 🧼 Clean the funnel and measuring container before use. Even a small amount of dirt can damage the transmission.
• 📘 A drain-and-fill normally removes approximately 3.3 US quarts, but the drained amount and final dipstick level determine the correct refill quantity.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the Dipstick and Drain Plug

• Open the hood and locate the automatic transmission dipstick. The dipstick is the removable fluid-level gauge with a loop handle near the transmission.
• Pull the dipstick out by hand, wipe it with a shop towel, and reinstall it temporarily. Confirming it can be removed prevents discovering a fill-access problem after draining the fluid.
• From beneath your Ridgeline, locate the transmission drain plug at the bottom of the transmission case. It has a square recess that accepts a 3/8-inch drive tool.

Step 2: Position the Drain Pan

• Put on safety glasses and nitrile mechanic gloves.
• Place the 10-quart drain pan directly beneath the transmission drain plug.
• Allow room for the initial fluid stream, which may travel outward several inches.

Step 3: Drain the Old Fluid

• Insert the 3/8-inch drive ratchet directly into the square recess in the drain plug.
• Turn the plug counterclockwise with the 3/8-inch drive ratchet. Finish removing it carefully by hand.
• Allow the fluid to drain until it slows to an occasional drip, usually 10-15 minutes.
• Inspect the old fluid. Dark fluid is common, but a burnt smell, metallic flakes, or large debris may indicate an internal transmission problem.
• Do not mistake clutch residue for metal flakes.

Step 4: Measure the Drained Fluid

• Carefully transfer the drained fluid into the 5-quart graduated measuring container.
• Record the amount removed. Approximately 3.3 US quarts is typical for one drain-and-fill.
• If much less fluid drains and there was no obvious leak, the transmission may already have been underfilled. Do not blindly refill only the measured amount; perform the final dipstick check carefully.

Step 5: Clean and Install the Drain Plug

• Wipe the drain plug clean with shop towels. A small amount of fine gray paste on its magnet is normally wear residue.
• Remove the old sealing washer and install one new transmission drain-plug sealing washer.
• Thread the drain plug into the transmission by hand to avoid cross-threading the aluminum case.
• Use the 3/8-inch drive torque wrench to tighten the drain plug to 49 Nm (36 ft-lbs).
• Wipe the case around the plug clean with a shop towel so any later leak will be easy to identify.

Step 6: Refill the Transmission

• Remove the transmission dipstick by hand.
• Place the clean long-neck transmission funnel into the dipstick tube.
• Add Honda ATF DW-1 slowly. Begin with approximately 3.0 US quarts, or slightly less than the measured quantity.
• Wait one minute for the fluid to settle, then remove the funnel and reinstall the dipstick fully.
• Do not overfill. Excess fluid can foam and cause poor shifting or transmission damage.

Step 7: Circulate the New Fluid

• If your Ridgeline was raised, use the 3-ton floor jack to lift it clear of the jack stands, remove the stands, and lower it fully onto level ground.
• Keep the parking brake applied and press the brake pedal firmly.
• Start the engine. Move the selector slowly through Park, Reverse, Neutral, Drive, and Low, pausing approximately three seconds in each position.
• Return the selector to Park and allow the engine to reach normal operating temperature. A short 10-minute drive provides a more reliable final check.

Step 8: Check the Fluid Level

• Park on level ground, shift to Park, apply the parking brake, and switch off the engine.
• Wait approximately 60-90 seconds after switching off the engine.
• Remove the transmission dipstick by hand and wipe it clean with a shop towel.
• Insert the dipstick fully, remove it again, and read both sides. The fluid should be within the upper hot-range marks.
• If the level is low, use the long-neck transmission funnel to add Honda ATF DW-1 in 100-200 mL increments.
• Reinstall the dipstick fully after the final check. Do not fill above the upper mark.

Step 9: Inspect for Leaks

• Use safety glasses and visually inspect beneath your Ridgeline without crawling under an unsupported vehicle.
• Check the drain-plug area for fresh fluid.
• If leakage is present, shut off the engine and verify that the sealing washer was replaced and the plug was tightened to 49 Nm (36 ft-lbs).

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✅ After Repair

• ✅ Drive for 10-15 minutes and confirm that shifts are smooth and normal.
• 🔍 Recheck the fluid level on level ground while the transmission is warm, 60-90 seconds after switching off the engine.
• 💧 Inspect the drain plug again for leakage after the test drive.
• ♻️ Pour the used fluid into sealed containers and take it to an authorized used-oil or automotive-fluid recycler. Do not pour it onto the ground or into a drain.
• 🛠️ No scan-tool reset, transmission adaptation reset, coding, or battery registration is required for a routine drain-and-fill.
• 📅 Under normal driving, Honda’s Maintenance Minder determines the service interval. Transmission-fluid service is associated with maintenance sub-item 3.

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💰 DIY vs Shop Cost

Shop Cost: ₹8,000-₹15,000 (parts + labor)

DIY Cost: ₹4,500-₹8,000 (fluid and sealing washer)

You Save: ₹3,500-₹7,000 by doing it yourself!

Local labor and imported Honda fluid prices vary. This repair takes a shop approximately 0.7-1.0 hour.

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