Auto Gearbox problems

Gentreau · 10-22-2006, 05:20 PM

I have a Carnival 2001 LHD 2.9Tdi Automatic and it has a problem with the auto gearbox. Sometimes (more and more recently) I will be driving at motorway speeds in top gear on a level road without accelerating and the box will suddenly change down a gear. It will stay that way for anything between a few seconds and several minutes and then behave normally. I have also started to notice that when the engine is cold the box doesn't seem to want to go into the top gear either.

I am trying to get a workshop manual to find all the sensors and controllers which might be involved, but wondered if anyone here had any ideas or experience.... ??

Any thoughts or suggestions gratefully accepted.

Vesa · 12-06-2006, 10:40 AM

I have exactly same phenomens in my 2002 2.9crdi . And also that gearbox is downshifting too early, there is lots of torgue in the engine but that gearbox seems to be made for 900cc fiat engine...

Gentreau · 12-06-2006, 03:21 PM

I now have the workshop manuals and I am starting to suspect the solenoids (there are 3). I need to determine whether the control box is sending the right signals or whether there is a bad connection to the solenoids. If I get a result, I'll post it here.

Vesa · 12-13-2006, 04:35 AM

Ok. I'm waiting for the results... Does anyone know who's product this gearbox is? ZF etc...? It would be great if that "hold" putton could be changed to keep 4th gear on in my case.