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2018 Charger R/T Transmission Fluid Service Interval?

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Mike T. · rep 0 · May 25, 4:18 AM · 1 replies · solved · Question

Vehicle: 2018 Dodge Charger R/T

My 2018 Dodge Charger R/T just hit 60k miles. I've been doing regular oil changes, but I'm wondering about the transmission fluid. The owner's manual says "inspect" but doesn't give a clear change interval for normal driving conditions.

I've heard different things about "sealed for life" transmissions versus needing service. I want to keep this car running strong, especially with the Hemi engine. Should I get a full flush or just a drain and fill? Any specific fluid recommendations for the 8-speed automatic?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:18 AM

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For your 2018 Dodge Charger R/T with the 8-speed ZF automatic transmission, proper fluid maintenance is crucial, especially at 60,000 miles.

Here's what you need to know:

  1. Service Interval: While some manufacturers label transmissions as 'sealed for life,' ZF, the manufacturer of your 8HP transmission, recommends a fluid and filter change between 50,000 and 75,000 miles for optimal longevity, particularly under demanding conditions (towing, spirited driving, hot climates). Your 60k mileage is a good time to consider this service.
  2. Fluid Type: It is absolutely critical to use the correct fluid. Your 8HP transmission requires a specific ZF Lifeguard 8 fluid or an equivalent Mopar-approved fluid (e.g., Mopar ZF 8&9 Speed ATF). Using the wrong fluid can lead to premature transmission wear and failure.
  3. Drain and Fill vs. Flush: A drain and fill replaces only a portion of the fluid. A full flush (using a specialized machine) can replace nearly all the fluid. For a first-time service at 60k, a comprehensive fluid and filter change (which often involves dropping the pan, replacing the filter, and refilling) is generally recommended. A 'flush' by itself without filter replacement is less effective.
  4. Benefits: Fresh fluid ensures proper lubrication, cooling, and hydraulic pressure within the transmission, preventing wear and maintaining smooth shifts. Old fluid can degrade, leading to increased friction, heat, and potential internal damage.
  5. When to See a Shop: While a drain and fill can be a DIY project for experienced mechanics, changing the filter and ensuring proper fill levels (which often requires specific temperature monitoring) is best left to a professional shop familiar with ZF transmissions. If you've experienced any shifting issues or a P0700 (Transmission Control System Malfunction) code, definitely consult a specialist immediately.
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