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Rough Shifting & Shudder on 2019 Ram 1500 Hemi - Transmission Fluid?

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Mark S. · rep 0 · May 22, 3:36 AM · 1 replies · solved · Question

Vehicle: 2019 Ram 1500 Laramie 5.7L Hemi

Hey everyone, I've got a 2019 Ram 1500 Laramie with the 5.7L Hemi and about 85,000 miles on it. Lately, I've noticed some rougher shifts, especially between 2nd and 3rd gear, and a slight shudder when accelerating at highway speeds. It's not constant, but it's definitely noticeable.

I've heard these 8-speed transmissions are 'sealed for life,' but 85k miles seems like a lot without a fluid change. Could this be a transmission fluid issue, or am I looking at something more serious? What's the recommended service interval for the transmission fluid on these trucks? Any advice on what I should check first would be great.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:36 AM

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It's a common misconception that modern transmissions are 'sealed for life.' While some manufacturers don't specify a strict interval for light-duty use, heavy-duty use, towing, or high mileage often warrants a fluid and filter change.

Here's what you should consider:

  1. Transmission Fluid & Filter Change: For your 2019 Ram 1500 with 85,000 miles, especially if you tow or drive in demanding conditions, a transmission fluid and filter change is highly recommended. The 8HP70 ZF transmission used in your truck benefits greatly from fresh fluid. Old, degraded fluid can lead to rough shifts, shuddering, and increased wear.
  2. Check Fluid Level & Condition: Before a full change, ensure the fluid level is correct (this often requires specific procedures and temperatures, so a shop might be best). Also, note the fluid's color and smell. Burnt-smelling or very dark fluid indicates significant wear.
  3. Diagnostic Scan: Even without a Check Engine Light, a professional diagnostic scan can reveal pending transmission-related trouble codes (e.g., P07xx series codes) that might point to solenoid issues or other internal problems.
  4. Software Updates: Sometimes, rough shifting can be resolved with a transmission control module (TCM) software update from the dealership.

When to See a Shop: If a fluid and filter change doesn't resolve the issue, or if you notice any new warning lights, severe slipping, or loud noises, it's crucial to have a qualified transmission specialist inspect the vehicle immediately. Ignoring these symptoms can lead to costly repairs down the line. A professional can accurately diagnose internal transmission issues that DIY methods can't address.

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