Problem
A 2016 Prado GX with a manual gearbox experienced a stiff gear shift when changing from 6th to 5th gear after driving at consistent highway speeds (e.g., 100 km/h) for an hour or more. The issue manifested as requiring significant force to move the gear shift out of 6th and into 5th. Repeated shifting between gears would temporarily alleviate the stiffness.
Solution
The issue is a known problem, documented in a Toyota service bulletin for HiLux vehicles with the same engine/gearbox. The cause is a selector pin on the side of the gearbox that “hydraulically locks” after extended highway driving. The fix involves replacing the existing selector pin with a modified pin that has a flat edge. This allows oil to bypass the pin, preventing the hydraulic lock.
This technical summary was auto-generated based on recovered archives. Do not rely on its factual accuracy. Refer to the original thread. Source: View Original Conversation
Continue the discussion below.