How to Change Transmission Fluid on a 2018 Acura MDX (6-Speed or 9-Speed)
Step-by-step drain-and-fill guide with correct fluid specs, tools, crush washers, and level-check procedure
How to Change Transmission Fluid on a 2018 Acura MDX (6-Speed or 9-Speed)
Step-by-step drain-and-fill guide with correct fluid specs, tools, crush washers, and level-check procedure
🔧 MDX - Transmission Fluid Change
On your MDX, “changing” the transmission fluid is usually done as a controlled drain-and-refill using the correct Acura/Honda-spec fluid and a level-setting procedure. The exact steps (and the correct fluid) depend on which transmission your MDX has.
Difficulty Level: Intermediate | Estimated Time: 1.0-2.0 hours
⚠️ Safety & Precautions
- 🛑 Work on a level surface and support the MDX with jack stands—never rely on a jack alone.
- 🛑 Transmission fluid can be hot; let the drivetrain cool before opening any plugs.
- 🛑 Keep the fill plug removable before you drain anything (so you don’t get stuck unable to refill).
🔧 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
- Metric socket set (8mm-19mm)
- 3/8" drive ratchet
- 1/2" drive breaker bar
- Torque wrench (10-100 ft-lbs)
- Trim clip removal tool
- Drain pan (at least 10-quart)
- Fluid transfer pump (hand pump) (specialty)
- Long funnel with hose
- Shop rags
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Automatic transmission fluid (correct spec for your transmission) - Qty: 4-10 quarts
- Transmission drain plug crush washer - Qty: 1
- Transmission fill plug crush washer (if equipped) - Qty: 1
- Brake cleaner - Qty: 1
📋 Before You Begin
- 🧭 Park on level ground, set the parking brake, and chock the rear wheels.
- Confirm which transmission you have (this changes the fluid type and level-setting procedure).
- Please answer these 2 quick questions so I can give you the exact, spec-correct steps and torque values:
- 1) Do you have the push-button shifter (P/R/N/D buttons) or a traditional shift lever?
- 2) Do you want a single drain-and-fill or the more complete 3x drain-and-fill (drive between each) service?
🔨 Step-by-Step Instructions
Follow these steps in order:
I can’t give the correct fluid spec, fill/level procedure, or torque specs until I know which transmission you have (push-button 9-speed vs shift-lever 6-speed) and which service type you want.
✅ After Repair
- 🔍 Verify there are no leaks at the drain/fill plugs after a short test drive.
- 🔁 Recheck the fluid level using the correct factory procedure for your transmission.
💰 DIY vs Shop Cost
Shop Cost: $250-$600 (parts + labor)
DIY Cost: $60-$220 (parts only)
You Save: $190-$380 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 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.
