Automatic Transmission Misbehaving

[Mike O.]

My October 2013 Exclusive 2.0HDi Auto Tourer has been a pleasure to drive, however two things, both transmission related, have caught my attention:

1. The auto transmission has been programmed for economy, so it likes to keep the revs so low, that the car vibrates.

2. When I press the accelerator to the floor (more pronounced in low gears) and then lift my foot after realising I don't need that much power, the engine senselessly revs to 4500 rpm before changing gear.

Pressing the pedal to the floor is a habit from my previous 2004 2.2HDi Auto SX Wagon.

I will soon learn not to do it, but still a modern auto transmission should not react that way.

 

Has anyone else encountered such a situation?

Any remedies?

 

Kind regards,

 

Mike O.

[qman3428]

I found the car stopped vibrating when I used better quality fuel (not supermarket). These gearboxes learn from the user so you may find given time that it stops the behaviour but then again by putting your foot down so hard you might be teaching the box that you want full power, hence full revs. As you say, adapt your driving style and the issue will go away.

[Mike O.]

Thanks qman,

 

I did some experimenting today.

 

Point 1. was cured to a large extent by pressing the Sport button on the transmission.

The side effect was, that now the car held the gear (on full throttle) to 5,000 RPM.

It didn't revv senselessly though and change gears when I eased on the throttle.

I will try the BP Ultimate Diesel next - it is supposedly the best available in Australia. 

 

Point 2. I didn't manage to replicate the problem to any worrying extent.

BTW, It wasn't a safety issue, just an annoyance.

No runaway acceleration, like some Toyotas, just staying in too low a gear with way too high revs for too long after an energetic application and then backing off the loud pedal.  

 

I will keep experimenting (and soon drop the habit of pressing the pedal to the metal).

 

Does anyone have a diagram with the power and torque curves of the new 2.0HDi (120 kW, 340 Nm)?

I suspect revving  diesel to 5,000 RPM serves no purpose, but it would be good to have a look at the power and torque curves...

 

Regards,

 

MikeO.

[coastline taxis]

The car has a adaptive drive cycle were it learns from the way its driven. give the car a bsi reset then take it out on the road for half a hour. make sure you do round the town and a bit motorway driving