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2018 TLX V6 Transmission Fluid Change - Which Fluid and How Many Drains?

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Tom H. · rep 0 · May 22, 4:58 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 A-Spec

Hey everyone,

I've got a 2018 Acura TLX V6 with about 75,000 miles on it. I'm looking to do a transmission fluid change myself for the first time. I've heard a lot about the '3x3' method, but I'm a bit confused about which fluid to use. Is it still DW-1 for this model year, or something else?

Also, how many quarts does it typically take for a single drain and fill? Any tips on the process, especially for getting the fill plug off without stripping it? I want to make sure I do this right to keep my transmission healthy.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:58 AM

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ClearTheCode admin answer:

Performing a transmission fluid change on your 2018 Acura TLX V6 is a great way to maintain its longevity. Here's what you need to know:

  1. Fluid Type: For your 2018 Acura TLX V6, you absolutely need to use Acura Genuine ATF DW-1 automatic transmission fluid. Do not use any other type of fluid, as it can cause damage to your transmission. Honda/Acura transmissions are very particular about their fluid.
  2. Drain and Fill Capacity: A single drain and fill typically removes about 3.5 to 4 quarts of fluid. The '3x3' method involves performing three consecutive drain and fills, driving the car for a short period (e.g., 10-15 minutes) between each to allow the new fluid to mix with the old. This method effectively replaces a much higher percentage of the total fluid volume than a single drain and fill.
  3. Procedure Tips:
    • Warm Engine: Perform the fluid change when the engine is at operating temperature. This helps the fluid drain more completely.
    • Drain Plug: The drain plug is usually a 3/8-inch square drive. Use a breaker bar if it's tight. Ensure you have a new crush washer for the drain plug; it's critical for preventing leaks. The torque spec for the drain plug is typically around 36 lb-ft.
    • Fill Plug: The fill plug is often located on top of the transmission, sometimes under the airbox or battery tray. It might be a 17mm or 19mm bolt. Use a funnel with a long, flexible hose to make filling easier.
    • Level Check: After each fill, drive the car briefly, shift through all gears, and then check the fluid level with the engine off (for DW-1 fluid, check within 60-90 seconds after turning off a warm engine) on a level surface. The dipstick has hot and cold marks.

Causes of Transmission Issues: Neglecting fluid changes is a primary cause of premature transmission wear. Over time, ATF breaks down and loses its lubricating and cooling properties, leading to increased friction and heat.

When to See a Shop: If you notice any unusual shifting, slipping, or hear strange noises from the transmission before or after the fluid change, it's best to consult a professional Acura technician. Also, if you're uncomfortable with the DIY process or encounter stripped bolts, a shop can perform the service correctly.

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