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2016 Discovery Sport Transmission Jerking/Hesitation

0

Mike T. · rep 0 · May 25, 4:42 AM · 1 replies · solved · Question

Vehicle: 2016 Land Rover Discovery Sport HSE

Hi all, I'm having some frustrating issues with the transmission in my 2016 Land Rover Discovery Sport HSE. Lately, it's been jerking quite a bit, especially when shifting from 1st to 2nd gear, and sometimes when downshifting. There's also a noticeable hesitation when accelerating from a stop.

It's got around 70,000 miles on it, and I've kept up with all the regular maintenance. I'm worried this could be a major problem. Has anyone else experienced this with their Discovery Sport, especially the earlier models with the 9-speed ZF transmission? What was the cause and what kind of repair was needed?

Any insights or shared experiences would be really helpful before I take it in to get looked at.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:42 AM

0

ClearTheCode admin answer:

It sounds like you're describing common symptoms associated with the ZF 9HP 9-speed automatic transmission found in your 2016 Land Rover Discovery Sport HSE. These transmissions, especially in earlier model years, have been known to exhibit issues like jerking, harsh shifts, and hesitation.

Here are the most common causes and potential solutions:

  1. Software Glitch/Adaptation Issues: Often, these symptoms can be resolved with a transmission software update or a transmission adaptation reset. The transmission's computer learns your driving style, and sometimes these adaptations can become corrupted, leading to erratic shifting. A dealer can perform a software flash and reset the adaptation values.
  2. Low or Contaminated Transmission Fluid: While the ZF 9HP is considered a 'sealed for life' unit by some manufacturers, the fluid does degrade over time. Low fluid levels or contaminated fluid can lead to poor shift quality. A fluid and filter change, using the correct ZF LifeguardFluid 9, can sometimes alleviate these issues.
  3. Valve Body or Solenoid Issues: The valve body controls the hydraulic pressure to engage different gears. Faulty solenoids or issues within the valve body itself can cause inconsistent pressure, leading to harsh shifts or hesitation. This is a more involved repair.
  4. Internal Transmission Wear: In more severe cases, internal components of the transmission may be worn, requiring a rebuild or replacement. This is less common at 70,000 miles if the fluid has been maintained, but not impossible.

When to See a Shop:

  • Prompt Action: Transmission issues should not be ignored. Continuing to drive with harsh shifts can accelerate wear on internal components, turning a potentially minor fix into a major overhaul.
  • Specialized Diagnosis: It's crucial to take your Discovery Sport to a Land Rover dealership or a transmission specialist who has experience with the ZF 9HP transmission. They have specialized diagnostic tools to read transmission fault codes (which may not always trigger a check engine light) and perform software updates. Describe the exact conditions under which the jerking and hesitation occur to help them pinpoint the problem.
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