2018 TLX V6 - Rough Shifts After 60k Miles, Time for Transmission Fluid?

ClearTheCode admin answer:

It's a common concern for Acura owners, especially as vehicles approach or exceed 60,000 miles. Rough shifting and hesitation can often be attributed to aging transmission fluid.

Here's what you should consider:

1. Check Fluid Condition:

   • Locate your transmission fluid dipstick (if equipped, some newer models are sealed or have a check bolt).
   • With the engine warm and running (check your owner's manual for specific instructions), pull the dipstick, wipe it clean, reinsert, and check the level and color.
   • Healthy transmission fluid is typically reddish and translucent. If it's dark brown, black, or smells burnt, it's definitely time for a change.

2. Acura's Maintenance Schedule:

   • Acura's Maintenance Minder system will typically indicate when transmission fluid service (code 3) is due. This is usually around 60,000 to 90,000 miles under normal driving conditions, or sooner with severe use.
   • For your 2018 TLX V6, a 3x drain and fill is often recommended by enthusiasts and some dealerships to ensure a more complete fluid refresh, as a single drain only replaces a portion of the total fluid.

3. DIY vs. Professional Service:

   • DIY: A transmission fluid drain and fill can be a DIY project for those comfortable with basic car maintenance. You'll need the correct Acura DW-1 automatic transmission fluid, a drain pan, and a torque wrench for the drain plug. Ensure you follow the specific procedure for your model year, including proper fluid level checking.
   • Professional: If you're unsure, or if the fluid looks particularly bad, taking it to an Acura dealership or a reputable independent shop is advisable. They have the right tools and experience, and can also check for any underlying issues. Avoid 'flushing' services unless specifically recommended by Acura, as these can sometimes dislodge debris in older transmissions.

Potential Causes:

• Degraded Fluid: Over time, transmission fluid breaks down, losing its lubricating and cooling properties.
• Clogged Filter: While less common for routine maintenance on some Acura models (many have internal filters not easily replaced), a severely clogged filter could restrict fluid flow.
• Solenoid Issues: Less likely at this mileage without a check engine light, but worn solenoids can cause shifting problems.

When to See a Shop:

• If the rough shifts are accompanied by a check engine light (even if it goes off).
• If you hear grinding noises or experience significant delays in engagement.
• If you're uncomfortable performing the fluid change yourself.
• If a fluid change doesn't resolve the issue, as it could indicate a more serious internal transmission problem.