406 HDI 110 (2002) Automatic gearbox strangeness

or burnt out clutches

here, so I can talk sensibly to my dealer.

and if I lift my foot off the gas, the revs drop slowly. So far so good. If
I accelerate, the revs increase slowly.

normal for the road speed (not going into top, I think), and if I come off
the gas, the revs drop down to idle (below 1000rpm). So at 60 MPH, I'm
seeing 2500rpm, accelerating sees the revs increase rapidly. After say 10
miles, the 'normal' behaviour comes back.

 

Hi guys. A query for you. I'd like to know where the problem might lie here, so I can talk sensibly to my dealer.

Under normal conditions, driving at 60 MPH, my rev counter reads 2000 rpm, and if I lift my foot off the gas, the revs drop slowly. So far so good. If I accelerate, the revs increase slowly.

Recently, when I first drive off (engine cold), the revs are higher than normal for the road speed (not going into top, I think), and if I come off the gas, the revs drop down to idle (below 1000rpm). So at 60 MPH, I'm seeing 2500rpm, accelerating sees the revs increase rapidly. After say 10 miles, the 'normal' behaviour comes back.

It sounds to me (uneducated guesses) that its either the computer, or the torque converter.

Can anyone point me in the right direction? Many Thanks
Roger

 

Hmm, I did not realise there were clutches in an auto gearbox (my lack of knowledge).

Thanks

 

could even be low oil level needs checking out though
diag2000 at dealer

 

Thanks Jeff: I'll go and see the dealer this week.

 

When the transmission is cold the torque convertor won't 'lock up'. When it
does, the revs will drop slightly... kind of feels as if you have an extra
gear.
Also AFAIK some boxes won't shift into top for the first few minutes.