🔧 Grand Caravan - Transmission Fluid & Filter Service

This service drains the old ATF, replaces the transmission filter, and refills with fresh fluid. Fresh ATF helps shift quality and transmission life, and the filter change helps keep debris out of the valve body.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a level surface and support the van with jack stands before going under it.
• ⚠️ ATF can be hot; let it cool if you just drove.
• ⚠️ Keep the van level when refilling/checking level, or the level reading will be wrong.
• ⚠️ Do not crawl under a vehicle supported only by a floor jack.
• ⚠️ Battery disconnect is not required for this job.

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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 (10-quart minimum)
• Socket set with 10mm socket
• Socket set with 13mm socket
• Ratchet (3/8")
• Torque wrench (inch-pound)
• Torque wrench (ft-lb)
• Trim clip tool
• Plastic scraper
• Brake cleaner spray
• Shop rags
• Long-neck funnel
• OBD2 scan tool that reads transmission temperature
• Transmission fluid dipstick tool 9336A (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• ATF+4 automatic transmission fluid - Qty: 6-7 quarts
• Transmission filter kit (filter + pan gasket) - Qty: 1
• Drain plug seal/washer (if equipped/separate) - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Warm the transmission slightly with a 5–10 minute drive, then shut the engine off and let it cool a bit so the ATF isn’t scalding.
• Raise the front with a floor jack and support with jack stands. Best practice is to keep the van level (raise all four corners if needed).
• Tip: Clean the dipstick tube cap area first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower splash shield (if equipped)

• Use a trim clip tool and your socket set to remove the fasteners and lower the shield.
• Set the fasteners aside so they don’t get lost.

Step 2: Drain the transmission fluid

• Place your drain pan (10-quart minimum) under the transmission pan.
• Use a 13mm socket and ratchet (3/8") to remove the drain plug (if your pan has one) and let the ATF drain fully.
• Reinstall the drain plug by hand first (to avoid cross-threading), then tighten with a torque wrench (ft-lb) to Torque to 20 Nm (15 ft-lbs).

Step 3: Remove the transmission pan

• Keep the drain pan under the transmission pan (more ATF will spill).
• Use a 10mm socket and ratchet (3/8") to remove the pan bolts, leaving two bolts loosely threaded at one end.
• Carefully pry the pan edge with a plastic scraper and let the remaining ATF drain, then remove the last bolts and lower the pan.
• Tip: Keep the pan tilted to control the spill.

Step 4: Replace the filter and clean the pan

• Remove the old filter (it may be held by bolts or clips depending on the filter kit design). Use your socket set if bolts are present.
• If the filter uses bolts, tighten the new filter bolts with a torque wrench (inch-pound) to Torque to 4 Nm (35 in-lbs).
• Clean the pan with brake cleaner spray and shop rags.
• Wipe the magnet(s) clean (they collect normal metal “fuzz”).
• Install the new pan gasket from the transmission filter kit.

Step 5: Reinstall the transmission pan

• Position the pan and start all bolts by hand.
• Tighten the bolts evenly in a crisscross pattern using a 10mm socket and ratchet (3/8").
• Final-tighten with a torque wrench (inch-pound) to Torque to 12 Nm (105 in-lbs).

Step 6: Refill with ATF+4

• Open the transmission fill tube cap (it’s the “dipstick tube” even though this transmission does not have a normal dipstick).
• Insert a long-neck funnel and add 4 quarts of ATF+4 automatic transmission fluid to start.
• Reinstall the fill tube cap loosely to prevent splashing.

Step 7: Start, circulate fluid, and set the level (critical)

• Start the engine and keep your foot on the brake.
• Move the shifter slowly through P-R-N-D and back to P, pausing 2–3 seconds in each gear to fill circuits.
• Use your OBD2 scan tool that reads transmission temperature to watch transmission fluid temperature.
• When the fluid is at normal operating temp (commonly around 80–90°C / 176–194°F), check level with the transmission fluid dipstick tool 9336A (specialty).
• The dipstick tool is a special measuring stick (it has a marked scale). Insert it fully into the dipstick tube, remove it, and read the level against the temperature chart on the dipstick tool instructions.
• If low, add ATF+4 in small amounts (about 1/4 quart at a time) using the long-neck funnel, then recheck.
• Tip: Overfilling can cause foaming and shifting issues.

Step 8: Reinstall splash shield and lower the van

• Reinstall the splash shield using your trim clip tool and socket set.
• Lower the van safely using the floor jack (rated 3-ton minimum).

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✅ After Repair

• With the engine running, inspect the pan perimeter and drain plug area for leaks.
• Road test 10–15 minutes, making sure shifts feel normal.
• Recheck for leaks and recheck fluid level at operating temperature using the OBD2 scan tool and dipstick tool 9336A.
• Dispose of used ATF at a recycling center or parts store that accepts fluids.

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💰 DIY vs Shop Cost

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

DIY Cost: $70-$140 (parts only)

You Save: $180-$310 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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