Transmission whine and failure (UA80 8-speed)
POWER TRAIN
41 NHTSA complaints · 2025-02 → 2026-07
“System Failed -Transmission makes a high pitch whine, which Toyota has identified as a product manufacturing issue with the 2017-2022 V6 Highlander, but has not done anything to rectify the issue for those of us out of warranty”
“I am reporting a premature transmission failure on a 2022 Toyota Highlander LE at approximately 85,000 miles. The vehicle began exhibiting a whining noise”
“Four days ago, engine started making a whining noise when accelerating, especially in lower gears. No warning signs”