Land Rover Repair: Land Rover Discover Series 2, land rover discovery 2, land rover discovery

Question
I purchased a 2000 Land Rover Discovery 2 and I am having problems with the transmission. I brought the vehicle to a transmission expert and was told there was nothing wrong with the transmission. He ran the diagnostics and a code appeared P0722, and it also stated no voltage output from the speed sensor. I replaced the speed sensor and I'm still having the same problems. I went to Land Rover and explained my problem, they ran diagnostics and I was told I might have a short in the wire, and to check for pin number 14 output shaft speed sensor negative and pin number 42 output shaft speed sensor positive. I checked the sensor and the wires and found no problems. The problem that I'm having is when you first take off, after 20-30 rmp you get a little kick and the sport and manual light appear on the dash and car goes into third gear in manual mode, which is drive able except when you first excel you have little power, because its in third gear. If you shut it off and start it up again it goes to the 20-30 rmp and kicks again. I was told by the transmission expert that there is nothing wrong with the torque converter, even though the error code 0722 states torque converter slipping. I even went a further step, and replaced EAT ECU transmission module, and that did not fix the problem. I still do not know if its electrical or mechanical.
If you can help, I would truly appreciate it.
Thanks,
Anthony
PS. The car only has 56,000 miles.

Answer
Hi Anthony,

this sounds like an electrical short between manual and sport modes.  You'll have to leave it with LR to solve this before you spend more money on parts that don't need replacing.

With such a sophisticated electronic transmission, I doubt most tranny shops can solve this type of problem.  It requires a LR testbook and experience.

Best of luck,

JohnMc