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2018 Charger R/T - Rough Shifting, Time for Transmission Fluid Service?

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Nicole W. · rep 0 · May 22, 5:47 AM · 1 replies · solved · Question

Vehicle: 2018 Dodge Charger R/T

Hey everyone,

I've got a 2018 Dodge Charger R/T with about 75,000 miles on it. Lately, I've noticed the transmission feels a bit 'off' – sometimes it hesitates when shifting, especially from 2nd to 3rd, and occasionally feels a little rougher than usual. It's not throwing any check engine lights or codes, but it's definitely noticeable.

I've owned the car since new and haven't touched the transmission fluid yet. I know some manufacturers say it's 'lifetime' fluid, but 75k miles seems like a lot without a change, especially with a Hemi.

Is this a sign that I should be looking into a transmission fluid and filter change? What's the recommended interval for these cars, especially if you drive them a bit spiritedly sometimes? Is this something a competent DIYer can tackle, or is it best left to the dealership or a specialist shop? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:47 AM

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ClearTheCode admin answer:

It's definitely a good idea to consider your transmission fluid at 75,000 miles, especially with the symptoms you're describing in your 2018 Dodge Charger R/T. While some manufacturers market 'lifetime' fluids, this often refers to the expected life of the first owner or under ideal conditions, not necessarily the entire lifespan of the vehicle. For performance vehicles like the Charger R/T, regular transmission maintenance is crucial.

Here's what you should consider:

  1. Check Fluid Level and Condition:

    • First, ensure the transmission fluid level is correct. On many modern Dodge vehicles, this requires a specific procedure (often checking when the transmission is at operating temperature).
    • Examine the fluid's color and smell. Healthy ATF (Automatic Transmission Fluid) is typically red or reddish-brown and has a slightly sweet smell. If it's dark brown or black, or smells burnt, it's a strong indicator that a fluid and filter change is overdue.

  2. Recommended Service Interval:

    • For severe driving conditions (heavy city traffic, frequent towing, spirited driving, hot climates), Dodge often recommends transmission fluid and filter service every 60,000 miles. For normal conditions, it might be extended, but 75,000 miles is certainly within the range where a change would be beneficial, especially with symptoms.
    • Refer to your owner's manual for the precise recommended interval for your specific model and driving conditions.

  3. DIY vs. Professional:

    • A transmission fluid and filter change on a modern Dodge Charger can be a moderately complex DIY job. It typically involves dropping the transmission pan, replacing the filter, cleaning the pan and magnet, and refilling with the correct type and amount of fluid (usually Mopar ATF+4).
    • Caution: A full 'flush' is different from a 'drain and fill.' A flush uses a machine to force new fluid through the system, potentially dislodging debris in older, high-mileage transmissions, which can sometimes cause more problems. A simple drain and fill (and filter change) is generally safer if the fluid is very old.
    • If you're not comfortable with the procedure, especially ensuring proper fluid level and torque specs, it's best to take it to a reputable shop or a Dodge dealership.

  4. Potential Causes for Rough Shifting (Beyond Fluid):

    • Low Fluid Level: The most common cause.
    • Worn Solenoids: The transmission's electronic solenoids control fluid flow for shifting.
    • Valve Body Issues: The valve body directs fluid to the clutches and bands.
    • Transmission Control Module (TCM) Software: Sometimes a software update can resolve shifting issues.
    • Internal Wear: Less likely at 75k miles without codes, but possible.

Given your symptoms, a transmission fluid and filter change is a logical first step. If the issue persists after the service, then it would be time to have a qualified technician perform a diagnostic scan (even without a CEL, pending codes might exist) and further inspect the transmission components.

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