This LRO reader emailed LRO.firstname.lastname@example.org seeking help for his hill-shy Discovery 1 300Tdi.
My 1995 Discovery 300tdi automatic struggles with long, steep hills. There are no warning lights on the dash and the temperature stays in the normal zone. The revs swing between 2000-3000rpm on hills. I looked in the vehicle handbook, and it said that sometimes the gearbox will be ‘searching’, which could be the cause.
The handbook says the manual override feature is an option. But I understood people just left autos in ‘Drive’ and let the gearbox work it out. The gearbox filter has been changed, the kickdown cable checked and a good-quality fuel lift pump fitted.
I spoke to a technician from Allisport, who said he’d be quite happy to put a gauge on to check the turbos’s boost pressure. He also said that tuning the vehicle may not fix an underlying issue. I respect this and thank Allisport for its honesty.
Chris Andrew, Cricklade, Wiltshire
The Tdi automatic Discovery does feel under powered compared to a manual version because the auto gearbox saps a fair amount of power. The ‘searching’ just makes matters worse. I always use the manual override on hills and also to gain engine-braking when slowing down. I would get the boost tested and remedy any problems that arise from that. After that, consider a larger intercooler and some mild tuning. Allisport can achieve great gains in both power and fuel economy, making it more relaxing to drive.
This workshop advice appeared in the September 2013 issue of LRO. Back issues are available to download on digital devices here.