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2018 TLX V6 Judder - Time for Transmission Fluid Change?

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Chris P. · rep 0 · May 25, 3:43 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 Advance

Hey everyone, I've got a 2018 Acura TLX V6 Advance with about 65,000 miles on it. Lately, I've noticed a slight judder or vibration, especially when accelerating gently around 30-45 mph. It's not constant, but it's definitely there.

I checked my maintenance records, and it looks like the transmission fluid has never been changed. I know Acura has specific service intervals, but I'm wondering if this judder is a sign that it's overdue. Has anyone else experienced this with their TLX?

Is this something I can tackle myself, or is it best left to a professional? I'm fairly handy, but I've heard the 9-speed ZF transmission can be a bit particular. Any advice on the specific fluid type or procedure would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:43 AM

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ClearTheCode admin answer:

Experiencing a judder in your 2018 Acura TLX V6, especially around 30-45 mph, is a common symptom associated with the 9-speed ZF automatic transmission, often resolved with a transmission fluid service. Given your mileage and lack of prior service, it's highly recommended to perform a fluid change.

Causes of Transmission Judder:

  1. Degraded Transmission Fluid: Over time, transmission fluid loses its lubricating and friction-modifying properties, leading to increased wear and inconsistent clutch engagement, causing the judder.
  2. Contaminants: Metal particles and clutch material can accumulate in the fluid, affecting valve body operation and clutch performance.
  3. Software Issues: Less commonly, a software update might be needed, but fluid service is usually the first step.

DIY vs. Professional Service: While a basic drain and fill can be done by a skilled DIYer, the 9-speed ZF transmission requires specific procedures. It's not a simple gravity drain and fill. Many recommend at least two or three 'drain and fill' cycles with some driving in between to replace a significant portion of the old fluid, as a full flush is generally not advised for this transmission.

Steps for DIY (if comfortable):

  1. Fluid Type: Use only genuine Acura DW-1 automatic transmission fluid. Do not use aftermarket fluids.
  2. Drain and Fill: Locate the drain plug and fill plug. Drain the old fluid. Measure the amount drained to ensure you refill with the correct volume. Refill through the fill plug until fluid begins to overflow.
  3. Level Check: The fluid level check is critical and must be done when the transmission is at a specific operating temperature (usually around 100-120°F or 38-49°C). This often requires a diagnostic tool to monitor temperature.
  4. Repeat: Perform 2-3 drain and fill cycles over a few hundred miles to dilute the old fluid effectively.

When to See a Shop:

  • If you're unsure about monitoring transmission temperature or the precise fill procedure.
  • If the judder persists after one or two fluid changes.
  • If you notice any unusual noises, shifting problems, or warning lights (e.g., Check Engine Light, D light flashing).

A professional Acura technician has the specialized tools and knowledge to perform this service correctly and can also check for any associated service bulletins or software updates that might apply to your vehicle. Addressing this promptly can prevent more extensive transmission issues down the line.

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