I have a Pic with automatic gearbox (2.0 litre petrol). When I decelerate
to a speed around 40 km/h (25 mph) the box does not shift down to a proper
gear for that speed. It insists on keeping a too high a gear (4th?). This
naturally results in a rumbling noise and vibration. To get a proper gear I
have to one of the following:
1. Decelerate significantly below the problematic speed and then accelerate
back to it
3. Put the box in Sport mode
I have never before encountered this in an automatic gearbox. Until now I
have thought that automatic transmission is... well... *automatic*
no human intervention in selecting a proper gear.
Is there something wrong with my box or is it an intentional feature serving
some purpose unknown to me?