Auto Box Problem

[bigwil1947]

Hi can anybody help,i have a galaxy auto  08 tdci.When you select drive it goes fine,until you go to stop the car,Its stays in continuos drive.Normally you can stop on tickover waiting to pull away again.You have to put this car it out of drive,otherwise the car will keep going or stalls as you are braking to stop it moving forward. The revs on the engine is fine.I drove the car recently for 130 miles and drove like a new one,everything is fine until you go to stop the vehicle.  ANY IDEAS

[Sher]

My understanding of auto operation is that the gearbox goes into "lockup mode" at around or above 1500rpm. At which time there is a fixed correlation between road speed and rpm, different for each gear which can be selected to some extent by slipping into "S" mode".

 In my experience in "S" mode the box drops out of lockup  and will switch down one gear as speed drops to some extent (approaching and going around roundabouts, provided I do not stop). On increasing acceleration  the speed picks up and it recovers the higher gear.

 

However, if I stop it drops back into 1st gear and sticks there  on acceleration unless I select a higher one by paddle movement or move to normal drive.

 

My suspicion is that your box is not leaving lockup mode anytime on slowing down. Check to see if it does switch to a lower gear in "S" mode at under 1500 rpm or so. on the overun? Does it hold rpm consistent with  road speed instead below those revs?

 

My auto experience is on a 2.7 litre  Honda auto box and my present 2.0TDCI MK III Aisin  6 speed box. I have assumed the box on the 1.8 is the same with "S" mode.