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2017 F-150 Lariat 10-Speed Transmission Shudder and Hard Shifts

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Mark S. · rep 0 · May 25, 1:37 AM · 1 replies · solved · Question

Vehicle: 2017 Ford F-150 Lariat

Hey everyone, I'm hoping for some advice here. My 2017 Ford F-150 Lariat, with the 3.5L EcoBoost and 10-speed transmission, has been acting up lately. It's got about 85,000 miles on it.

I've noticed a distinct shudder, especially when accelerating from a stop or at lower speeds, sometimes around 30-40 mph. It feels like the transmission is struggling to find the right gear or is slipping. Also, the shifts, particularly from 3rd to 5th and sometimes 7th to 8th, can be quite harsh and clunky.

I'm worried this might be a common issue. Has anyone else experienced this with their 2017 F-150? Is there a known TSB or recall I should be aware of before I take it to the dealer? I'm trying to avoid a costly diagnostic if it's something widely recognized.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:37 AM

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ClearTheCode admin answer:

This is a commonly reported issue for the 10R80 automatic transmission found in many 2017+ Ford F-150s, particularly with the 3.5L EcoBoost. Here's what you should know:

  1. Common Causes:

    • Transmission Fluid Degradation: Over time, the transmission fluid can degrade, leading to poor lubrication and increased friction, causing shudders and harsh shifts. Ford's service interval for transmission fluid is often longer than what some owners prefer, especially under heavy use.
    • Software Calibration Issues: Early versions of the transmission control module (TCM) software had known bugs that contributed to erratic shifting. Ford has released multiple Technical Service Bulletins (TSBs) addressing these calibration updates.
    • Internal Component Wear: Less commonly, but still possible, internal components like clutch packs or valve bodies can experience premature wear.

  2. When to See a Shop:

    • Immediately: If you experience any warning lights (e.g., check engine light, transmission warning), hear grinding noises, or the vehicle becomes difficult to drive.
    • Soon: If the shuddering or harsh shifts are consistent and worsening. Addressing it early can prevent more significant damage.

  3. Recommended Steps:

    • Check for TSBs: Visit a Ford dealership with your VIN. Ask them to check for any outstanding TSBs related to the 10R80 transmission for your specific model year. There have been TSBs like 18-2079, 19-2106, and 21-2311 (among others) that address various shift quality concerns, often involving software updates or fluid exchanges.
    • Transmission Fluid Service: Even if your maintenance schedule doesn't call for it, consider a transmission fluid and filter change, especially if it hasn't been done. Ensure they use the correct Mercon ULV fluid.
    • Diagnostic Scan: Have the dealer perform a diagnostic scan. While rough shifts don't always trigger a code, sometimes codes like P0700 (Transmission Control System Malfunction) or specific gear ratio errors (e.g., P0731, P0732) can be present.
    • Test Drive with Technician: Ask a technician to ride with you to experience the symptoms firsthand. This can help them pinpoint the issue more accurately.
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