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2021 Aviator Reserve - Harsh Shifting at Low Speeds, Any TSBs?

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Ryan M. · rep 0 · May 22, 6:12 AM · 1 replies · solved · Question

Vehicle: 2021 Lincoln Aviator Reserve

Hey everyone,

I've got a 2021 Lincoln Aviator Reserve with about 45,000 miles on it, and lately, I've been experiencing some really harsh shifts, especially when accelerating from a stop or at lower speeds (1st to 3rd gear range). It feels like a jolt sometimes, which is definitely not what I expect from a luxury SUV.

Has anyone else with a 2020-2022 Aviator experienced this? I'm wondering if there are any known Technical Service Bulletins (TSBs) or recalls related to the 10-speed automatic transmission for this model year. I've tried searching online but haven't found anything definitive.

Is this something a software update can fix, or should I be preparing for a more significant transmission repair? Any advice on what to tell the dealership when I bring it in would be greatly appreciated. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:12 AM

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ClearTheCode admin answer:

Harsh shifting in your 2021 Lincoln Aviator Reserve is a concern that should be addressed promptly, as it can indicate several underlying issues. The 10-speed automatic transmission (10R60/10R80 series) used in many Ford and Lincoln vehicles, including the Aviator, has had some known characteristics and occasional issues that can lead to the symptoms you're describing.

Here's what you should consider:

  1. Software Recalibration/Updates:

    • Cause: Often, harsh or erratic shifting can be resolved with a transmission control module (TCM) software update. Manufacturers frequently release updates to refine shift logic, improve drivability, and address specific complaints. The 10-speed transmission is highly dependent on its software for smooth operation.
    • Action: Your first step should be to have the dealership check for any available TSBs or software updates for your specific VIN. There have been TSBs (e.g., TSB 21-2092, TSB 21-2101, or similar depending on the exact build date and symptoms) related to harsh/delayed shifts for various Ford/Lincoln models with the 10-speed transmission, often recommending a software recalibration.

  2. Transmission Fluid Level and Condition:

    • Cause: Incorrect transmission fluid levels (either too low or overfilled) or degraded fluid can lead to poor shifting performance. While less common on newer vehicles, it's a possibility.
    • Action: Ask the technician to inspect the transmission fluid level and condition. Note that checking the fluid on these sealed transmissions requires specific procedures and tools.

  3. Internal Transmission Components:

    • Cause: If software updates and fluid checks don't resolve the issue, it could point to internal mechanical problems such as issues with the valve body, solenoids, or even clutch packs. These are less common but can occur.
    • Diagnostics: If a check engine light is present, common OBD-II codes related to transmission issues might include P0700 (Transmission Control System Malfunction), P0731 (Incorrect Gear Ratio 1st Gear), P0732 (Incorrect Gear Ratio 2nd Gear), or specific shift solenoid codes (e.g., P0750, P0755).

When to See a Shop:

You should schedule an appointment with your Lincoln dealership as soon as possible. Since your vehicle is a 2021 model, it's likely still under the powertrain warranty (5 years/60,000 miles), which would cover transmission repairs if they are due to a manufacturing defect. Be clear and specific with the service advisor about when the harsh shifts occur (e.g., cold start, specific gears, acceleration/deceleration). Request that they check for all applicable TSBs and perform a diagnostic scan for any stored or pending trouble codes.

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