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2018 Dodge Charger R/T - Rough Shifting & Transmission Fluid Service

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Christine P. · 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 some pretty rough shifts, especially from 2nd to 3rd gear, and sometimes a slight hesitation when downshifting. It's not constant, but it's definitely more noticeable than before.

I'm wondering if it's time to consider a transmission fluid and filter change. What are the recommended service intervals for these 8-speed transmissions? I haven't had any warning lights come on yet, but I'm trying to be proactive.

Has anyone else experienced similar issues with their Charger around this mileage? Any advice on what type of fluid to use or if this is something I can tackle myself?

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

It's good you're being proactive about your 2018 Dodge Charger R/T's transmission. Rough shifting at 75,000 miles can indeed be a sign that your transmission fluid is degrading or that the filter is becoming clogged. Here's what you should consider:

  1. Check Fluid Level and Condition: Before anything else, check your transmission fluid level and condition. On many modern transmissions, this requires specific procedures (often checking when warm and sometimes with a scan tool for temperature). Look for dark, burnt-smelling fluid or metal particles, which are signs of significant wear.

  2. Transmission Fluid Service Intervals: While Dodge, like many manufacturers, sometimes states 'lifetime' fluid for the ZF 8HP transmission in your Charger, most experienced technicians and enthusiasts recommend a fluid and filter change between 60,000 and 100,000 miles, especially under severe driving conditions (towing, frequent stop-and-go, hot climates). Your 75,000 miles falls right into this proactive service window.

  3. Correct Fluid and Filter: It is absolutely critical to use the correct transmission fluid. For the ZF 8HP transmission, this typically means ZF Lifeguard 8 fluid or an equivalent that meets the ZF TE-ML 11 specification. Using the wrong fluid can cause severe damage. Always replace the transmission filter during this service, as it's designed to trap contaminants.

  4. Potential Causes of Rough Shifting:

    • Degraded Fluid: Old fluid loses its lubricating and cooling properties.
    • Clogged Filter: Restricts fluid flow, leading to pressure issues.
    • Solenoid Issues: Less common, but worn or sticky solenoids can cause shifting problems.
    • Low Fluid Level: Can cause erratic shifting and overheating.

  5. When to See a Shop:

    • If a fluid and filter change doesn't resolve the issue, or if the problem worsens.
    • If you notice any warning lights, such as a check engine light or transmission warning light. Common OBD-II codes related to transmission issues include P0700 (Transmission Control System Malfunction) or specific P07xx codes indicating clutch, solenoid, or sensor problems.
    • If you're uncomfortable performing the service yourself, as it can be complex, requiring specific tools for fluid temperature monitoring and proper filling procedures.
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