There was a recall for a batch of manual-transmission Rangers built between 2015 and 2016 which had a poorly installed clip on the gearshift cable on the production line. Your car is from an earlier batch, but it’s not inconceivable that the problem is the same one.

The cable clip in question could allow the cable that operates the gear changes to make contact with the car’s driveshaft. At that point, gear-changing could become difficult or even impossible, which sounds pretty much like your symptoms. Check with a Ford dealer to see if your vehicle was covered by this recall.

Some Ford Ranger owners have reported that the hoses that carry coolant to the engine’s EGR valve have failed, allowing coolant to escape. This is one of the more common ways for this engine to lose coolant.

The problem with no warning showing up on the dashboard has more to do with physics. The warning light is triggered by the temperature of the coolant it’s submerged in. If the engine loses enough coolant, the sensor is suddenly not contacting the hot water and it ceases to give a reading or, therefore, trigger a warning. This is not a Ford Ranger thing, but a common problem faced by car owners over many decades.

It’s very unlikely a workshop would replace a component it fitted two years and 25,000km ago for free. Spare parts and repairs come with warranties, but generally not over that period of time or mileage. In any case, it sounds more like the clutch or flywheel has failed, rather than the master or slave clutch cylinders.

This model Ranger had a dual-mass flywheel designed to make for smoother operation, but the design cold also lead to premature clutch wear. When that happened, difficulty in selecting gears was one of the symptoms. Some owners when faced with this problem, converted their vehicles to a conventional single-mass flywheel to get around the problem in the future.