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2022 Defender 110 Transmission Hesitation and Rough Shifts

0

Mike T. · rep 0 · May 25, 4:47 AM · 1 replies · solved · Question

Vehicle: 2022 Land Rover Defender 110 P300

Hi everyone,

I've got a 2022 Defender 110 P300, and lately, I've noticed some unusual behavior from the transmission. It occasionally hesitates when accelerating from a stop, almost like it's searching for the right gear. I've also experienced some rougher-than-normal shifts, particularly between 2nd and 3rd gear, and sometimes downshifting.

It's not constant, but it's happening enough to concern me. Is this a known issue with the ZF 8-speed transmission in the newer Defenders? Are there any software updates or TSBs (Technical Service Bulletins) I should inquire about at the dealership? I'm hoping it's not a major mechanical problem.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:47 AM

0

Hello Emily,

Transmission hesitation and rough shifts on a relatively new 2022 Defender 110 P300 can definitely be alarming. The ZF 8-speed automatic transmission is generally very robust, but like any complex system, it can experience issues, especially with software calibration.

Here’s what you should consider:

  1. Software Calibration/Updates:

    • Cause: The most common cause for these symptoms on newer vehicles is outdated transmission control module (TCM) software. Manufacturers frequently release updates to refine shift logic, improve responsiveness, and address minor glitches.
    • Action: Inquire with your Land Rover dealership about any available software updates or re-calibrations for your specific vehicle's VIN. There have been TSBs issued for various Land Rover models concerning transmission shift quality.

  2. Adaptive Learning:

    • Explanation: The ZF transmission has an adaptive learning capability, meaning it adjusts its shift patterns based on your driving style. Sometimes, if the vehicle has had multiple drivers or unusual driving conditions, the adaptive values can become 'confused.'
    • Action: A dealership can reset the adaptive learning values, allowing the transmission to relearn optimal shift points based on your current driving habits.

  3. Transmission Fluid Level/Quality:

    • Cause: While less likely on a 2022 model, incorrect fluid levels or degraded fluid can impact shift quality. The ZF 8-speed is often considered 'sealed for life,' but fluid condition can still play a role.
    • Action: A shop can check the fluid level and condition, though this is a specialized procedure for sealed transmissions.

  4. Diagnostic Trouble Codes (DTCs):

    • Diagnosis: Even without a 'check engine' light, specific transmission-related fault codes (e.g., P0700 series) might be stored in the TCM. A professional scan can reveal these.

When to See a Shop:

  • Immediately, if the issues worsen or become more frequent, indicating a potential mechanical problem.
  • For a diagnostic scan and to check for any applicable software updates or TSBs.
  • If the vehicle is still under warranty, as these repairs should be covered.
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