This LRO reader emailed LRO.firstname.lastname@example.org to ask for help with intermittent faults torturing his Land Rover Discovery 2 Automatic Gearbox.
I have a 2000 Td5 Discovery with an intermittent fault affecting the auto gearbox. Just after starting, the sport and manual warning lights sometimes flash together and the gearbox feels partially locked up. Sometimes turning of and restarting seems to clear it, sometimes I need to do this three or four times. It usually disappears after this procedure and works normally until the next time. Holding down the gear lever console sometimes seems to help but I’ve been told the wiring here is okay. The handbook says to ‘seek qualified assistance’ but doesn’t say what the fault actually is. I’ve noticed a small oil leak that I think is coming from the front of the engine and has worked its way rearward, dripping off the bell housing just above the crossmember.
John Graham, Harrogate, North Yorkshire
The fault is most likely to be the gear position switch – the XYZ switch (part number UHB100190). This gives problems if the vehicle has aircon because the drain tubes drip on to the switch: most have extended tubes put on to rectify the fault. The switch is costly so it’s worth taking it off, cleaning and then drying it before fitting a new one. Confirm the
fault by having the gearbox ECU fault codes read: because the fault warning lamps have been on, there’ll be fault codes stored in the ECU. The oil leak could be coming from anywhere. Clean the front of the engine, then look to see exactly where the leak is.
This workshop advice appeared in the Feb 2015 issue of LRO. Back issues are available to download on digital devices here.