Hello guys! Recently I own a Fiat Croma 1,9 Mjet 150hp with auto gearbox. I want to ask those of you who own the same Croma.... During normal acceleration, approximately at what RPM and speed gearbox shifting gears?
My auto even in very smooth acceleration changes as follows
1st to 2nd - at 1500-1600rpm and 10 mph
2nd to 3rd - at 1600-1700rpm and 18-20 mph
3rd to 4th at 2100 rpm and 40-43 mph - but here something interesting hаppens... at almost 2000rpm and 30mph RMP fall slightly around 1800, and then continues to accelerate until it reaches 2100 rpm and 40mph and after that upshift to 4th.
from 4th to 5th - at 55mph, and from 5th to 6th at 65mph.
Is this normal for this box... I know it is a selfadapt gearbox, but I reset self adaptation, after I bought the car

Looks about right, same box as mine. One thing I do know is that you can't override the auto box with manual mode, it just refuses to do it.

Mine is a 2.4, the manual override aways works if the speed and revs are within the scope of the box.

The Aisin is a brilliant auto.

Keith

Yep mine is the same... in manual mode I can't upshift if the revs and speed are too low. It just make a beep sound
What bother me was that I had read somewhere that the same box but in other brands of cars, upshifting at lower rpm and speed....

This is normal. At 2000 rpm the torque converter lock kicks in. It is there for better fuel consumption at higher speeds. That's what causes the drop in engine speed.

keithglos said:

Mine is a 2.4, the manual override aways works if the speed and revs are within the scope of the box.

The Aisin is a brilliant auto.

Keith

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Until the valve block fails as it did on mine. Even Wonga couldn't sort that one. :-(

My 2.4 has only done 44000, and I know a man who can (repair it).
Keith

Radlet6 said:

Until the valve block fails as it did on mine. Even Wonga couldn't sort that one. :-(

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What was the symptoms of valve block fail?

Changing from 2nd to 3rd the box would lose drive for half a second. The revs would go up, obviously, and then it would change into 3rd with a massive whack! The only way round it was to use the tiptronic and lift off between 2nd and 3rd to keep the revs down.