Yes after driving down slip road off motorway and come to a stop D is still showing on gear console and on dash but it's not engaged. I have to shove hazards on and rev it a few times. Sometimes holding revs at around 1500 to 2000 before it will engage again. Sometimes the D and m&s lights are...

Thank you. I'll do that after work and give them both a good clean on contacts.

Can the ECU be removed completely from wireing without affecting anything like immobiliser/ ignition etc. I want to disconnect both black and red plugs to check and clean them. I know the red one can be but what about the black.

Update head etc all done and fine. I cleaned the xyz and it was no different. So I went out and got another one. Second hand but it was working fine on the car it came off. Just fitted that and STILL the bloody same. A pig to engage gears at first but then seems to go through gears ok while...

Thanks for that. I did some digging on u tube and saw how to do the xyz switch. There was also a reference saying it maybe the ecu getting oil tracking down the harness into the red connector block and there for shorting out. I checked this yesterday and sure enough it was there. All cleaned...

All checked and ok. Gearbox had new oil and filter not long after buying it. Then again after I started having troubles

Looking for advise to most likely cause for this problem. The problem I have is I put it in any gear and nothing happens for quite a while then it will engage gears. While driving it seems ok changing gears although not always smooth. Is it likely to be the xyz switch. The torque converter...

I did all that but thank you. I got told when I was talking to people about doing oil change. First time I have come across this method.

Yes Henry I tried it manually with no effect. The oil I got out was dark but red sort of colour going in when I changed the filter also around 4 or 5000 miles ago. As for eml lights it seems they have a mind only known to themselves ever since getting the car.

I have a disco td5 auto and the gearbox is playing up. What's happening is it sticks between gears until revs are high, above 4000, then it will go up a gear but with a hell of a bang. I changed the oil and filter about 4 or 5000 miles ago. So I am asking what to look for to repair this fault...