The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2018 TLX 9-Speed Transmission Jerking and Hard Shifts - Is This Normal?

0

Melissa G. · rep 0 · May 22, 5:02 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 Advance

Hey everyone,

I've got a 2018 Acura TLX V6 with the 9-speed automatic transmission, and I've been noticing some really harsh shifts lately, especially when downshifting or accelerating from a stop. It feels like the car is jerking sometimes, which is pretty unsettling for a luxury sedan.

It's most noticeable in lower gears, like 1st to 2nd or 2nd to 3rd, and also when slowing down. Sometimes it feels like it's hunting for gears. I bought it used a few months ago, and I'm wondering if this is a known issue with these transmissions or if I should be worried about a major problem.

Has anyone else experienced this with their 2016-2020 TLX or MDX? Is there a software update or a TSB I should be aware of? Any advice on what to tell the dealership would be greatly appreciated. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:02 AM

0

ClearTheCode admin answer:

It sounds like you're experiencing common characteristics of the ZF 9HP 9-speed automatic transmission found in your 2018 Acura TLX V6. While Acura and ZF have made efforts to refine this transmission, some owners still report issues with harsh or erratic shifting, especially in earlier model years.

Here's what you should know and do:

  1. Software Updates: The most common solution for these symptoms is a transmission software update. Acura has released multiple software revisions to address shifting logic, smoothness, and overall drivability. Your dealership can check if your vehicle's Transmission Control Module (TCM) has the latest software. This is often the first step in diagnosing and resolving such issues.
  2. Transmission Fluid Check: Ensure the transmission fluid level is correct and that the fluid itself is in good condition. Low or degraded fluid can contribute to shifting problems. Acura specifies a particular fluid (DW-1 or Type 2.0) and a specific procedure for checking the level.
  3. Adaptive Learning: Automatic transmissions, especially modern ones, have adaptive learning capabilities. Your driving style can influence how the transmission shifts. Sometimes, a transmission reset (which can be done by the dealer or by disconnecting the battery for a period, though the latter is less precise) can clear the learned parameters, allowing the transmission to "relearn" your driving style.
  4. Technical Service Bulletins (TSBs): There have been several TSBs related to the 9-speed transmission in the 2015-2020 TLX and MDX models. These TSBs often detail specific diagnostic procedures and software updates to address various shifting concerns, including harsh shifts, delayed engagement, and gear hunting. Ask your dealership to check for any open TSBs or recalls applicable to your VIN.
  5. When to See a Shop: If a software update and fluid check don't resolve the issue, or if you notice any warning lights (like a 'Check Engine' light, which could indicate a P07xx series transmission code), it's crucial to have a qualified Acura technician perform a thorough diagnostic. They can check for internal transmission faults, solenoid issues, or other mechanical problems that might require more extensive repair. Early intervention can prevent more severe damage.

Always provide your dealership with a detailed description of when and how the shifting issues occur to help them accurately diagnose the problem.

Menu

Help & account