2018 Toyota Highlander: harsh or hard shifting

Filed Oct 27, 2026 · Transmission · MI

Within 1 mile of the Dealership, the new to us, 2018 Highlander was: -Lunging, not accelerating/Delayed shifting -Unpredictable surging -unintended acceleration -Excessive revving before upshifting I brought it back to the dealership & was given a loaner vehicle Once the transmission line was supposedly fixed, I drove it home. Then discovered it had leaked onto my driveway. They took it back & fixed something in the transmission again. After a few months, we thought it was good to go. In October 2026 it was doing all of the above lunging, lack of response from Transmission Again. I drove it to the dealership. Then told I needed a replacement Transmission. They said line rusted and was leaking. I have been asking if they have pictures from prior services. I have continually gotten under body washes & don’t believe that it started rusting while I was the owner. This transmission is obviously defective like the ones in class action lawsuits. I have called the dealer & now Toyota Customer Care to discuss them doing the right thing. Which I believe would be them taking responsibility and paying for the new transmission. It has been a month of waiting for a transmission to be located.

Filed Oct 26, 2026 · Engine, Transmission · MD

While driving, my vehicle experienced a severe and sudden failure of the Aisin UA80F 8-speed automatic transmission. The transmission exhibits erratic and hard shifting, severe hesitation, and a dangerous delay in acceleration when trying to merge into traffic or accelerate from a complete stop. Frequently, the engine revs high, but the transmission fails to engage the gear promptly, resulting in a sudden, violent lurch forward when it finally catches. Furthermore, the vehicle intermittently loses motive power entirely while in motion, forcing me to coast to the side of the road. A loud, high-pitched whining noise is audible from the transmission assembly, and diagnostic checks indicate internal mechanical overheating and premature component wear.

Filed Aug 31, 2026 · Transmission · MI

whining sound in the transmission, including high-pitched whining, erratic shifting, clunks, hesitation, and premature failure. These vehicles are equipped with the UA80F (AWD) and UA80E (FWD) 8-speed automatic transmissions.

Filed Jun 25, 2026 · Body, Suspension · 101,000 miles · MD

The contact’s daughter owns a 2018 Toyota Highlander. The contact stated that while operating the vehicle, there was a clunking sound coming from the front driver’s side of the vehicle. The vehicle was taken to the local dealer, and the owner was informed that the struts needed to be replaced. The vehicle was not repaired. The vehicle was later driven to a local tire and battery service center who inspected the vehicle and informed the owner that the front control arms were rusted and needed to be replaced, and that the front axle was cracked. The vehicle was not yet repaired. The daughter was informed that the vehicle was unsafe to drive. The manufacturer was not yet contacted. The failure mileage was 101,000.

Filed Feb 12, 2026 · Transmission · AR

Transmission whining, hard shifting on 1 and 2 and 3 JP Pauley toyota claim my 2018 Highlander is not part or TBD and neew transmission is required to fix issue quote $7300. to repair current mileage 156K

Filed Nov 7, 2025 · Transmission · UT

Transmission, whine rough shifting issues. Yes can be looked at. Tough to hear over the noise, harder to know when its going to change gears and increase speed due to slow/intermittent gear shifts. Yes they have a TSB from Toyota that descript the issue and Toyota has extend some vins warranty's for this issue but not for all affect vehicles apparently. No, not by any of those. Yes DTC have come on for awd system issues. Frist appear at 90K.