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2016 Grand Cherokee Overland Rough Shifting - Is This Normal?

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Mike T. · rep 0 · May 25, 2:25 AM · 1 replies · solved · Question

Vehicle: 2016 Jeep Grand Cherokee Overland

Hey everyone,

I've got a 2016 Jeep Grand Cherokee Overland with the V6, and lately, the transmission has been acting up. It feels like it's hesitating to shift, especially from 1st to 2nd and sometimes 2nd to 3rd at low speeds. It's not always smooth and can feel pretty clunky.

Is this a known issue with the 8-speed ZF transmission in these models? I've heard some people mention similar problems. Are there any TSBs (Technical Service Bulletins) or recalls I should be aware of? I'm wondering if it's something a software update could fix, or if it's a more serious mechanical problem. Any advice or experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:25 AM

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ClearTheCode admin answer:

Transmission shifting issues in the 2016 Jeep Grand Cherokee, particularly with the ZF 8-speed, are not uncommon and often stem from a few key areas. It's good you're looking into TSBs, as software updates are frequently released to address these concerns.

  1. Software Updates: The most common fix for harsh or erratic shifting is a transmission control module (TCM) software update. Dealerships can check for and apply the latest calibrations. These updates often refine shift points and pressures to improve overall smoothness.
  2. Transmission Fluid and Filter: While the ZF 8HP is considered 'lifetime fill' by some, many experts recommend a fluid and filter change around 60,000-80,000 miles, especially if you experience shifting issues. Using the correct ZF-approved fluid is critical.
  3. Valve Body/Solenoid Pack: In some cases, issues can be traced to the valve body or its integrated solenoid pack. Worn or sticking solenoids can lead to inconsistent fluid pressure and poor shifting. This is a more involved repair.
  4. Common OBD Codes: If a Check Engine Light (CEL) illuminates, look for codes like P0700 (Transmission Control System Malfunction), P0731/P0732/P0733/P0734 (Incorrect Gear Ratio for various gears), or P0729 (Incorrect Gear Ratio for 6th gear), which point directly to transmission issues.

When to See a Shop: If a software update doesn't resolve the issue, or if you notice any new noises, fluid leaks, or a persistent CEL, it's crucial to have a qualified mechanic or dealership diagnose the transmission promptly. Ignoring these signs can lead to more severe and costly damage. Early diagnosis can save you significant repair costs.

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