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2018 CX-5 Rough Shifting - Time for Transmission Fluid Change?

0

Robert C. · rep 0 · May 22, 4:52 AM · 1 replies · solved · Question

Vehicle: 2018 Mazda CX-5 Grand Touring

My 2018 Mazda CX-5 Grand Touring, with about 75,000 miles, has started feeling a bit rough when shifting, especially between 2nd and 3rd gear. It's not terrible, but definitely noticeable compared to how smooth it used to be. I've heard Mazda says the transmission fluid is "lifetime," but that seems optimistic.

I'm wondering if it's time to consider a transmission fluid flush or drain and fill. Has anyone else with a similar year/model experienced this? What's the recommended interval for these vehicles, even if Mazda doesn't explicitly state one?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:52 AM

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Hello Sarah,

It's a common concern among Mazda owners regarding the 'lifetime' transmission fluid. While Mazda suggests it doesn't need regular replacement under normal conditions, many automotive experts and experienced technicians recommend servicing the transmission fluid, especially for vehicles with higher mileage or those driven under severe conditions (e.g., heavy traffic, towing, extreme temperatures).

Here's what you should consider:

  1. Causes of Rough Shifting:

    • Degraded Transmission Fluid: Over time, transmission fluid loses its lubricating properties and can accumulate wear particles, leading to increased friction and rougher shifts.
    • Low Fluid Level: A low fluid level can cause pressure issues within the transmission, affecting shifting performance.
    • Internal Transmission Wear: While less common at 75,000 miles, internal component wear can also contribute to shifting problems.

  2. Recommended Action - Drain and Fill:

    • For your 2018 Mazda CX-5, a 'drain and fill' is generally recommended over a full 'flush' if you haven't serviced it before. A flush can sometimes dislodge particles that might cause new issues in older transmissions. A drain and fill replaces only a portion of the fluid, which is safer.
    • DIY Steps (if comfortable):
      1. Ensure the vehicle is level and cool. Locate the transmission drain plug (refer to your owner's manual or a service guide).
      2. Place a drain pan underneath and remove the plug to drain the old fluid.
      3. Replace the drain plug with a new washer.
      4. Locate the transmission fill plug/dipstick tube. Using a funnel, refill with the specified Mazda ATF (Automatic Transmission Fluid) to the correct level. Consult your owner's manual for the exact fluid type and capacity.
      5. Start the engine, shift through all gears while stationary, and recheck the fluid level.

  3. When to See a Shop:

    • If the rough shifting persists after a fluid change.
    • If you notice any unusual noises, burning smells, or a check engine light (especially with transmission-related codes like P0700).
    • If you're not comfortable performing the DIY steps, a professional can ensure the correct fluid is used and the level is accurate. They can also perform a diagnostic scan for any underlying issues.
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