Automatic Transmission problems of the 2004 Jaguar XJ8

While stopped at a red light, foot on brake, shift in drive, vehicle went into very high rate of acceleration and lunged uncontrollably forward. Luckily there was no vehicle in front of me as I would have crashed into it. I notified the dealer and he referred me to a local dealer. The vehicle was inspected and I was assured that they found nothing wrong. This was a very scary situation and the manufacturer should seriously look into the matter.

This Jaguar 2004 Xj8 has been subject to 6 unintended acceleratons over a period of half a year including two in the dealer's shop. When in traffic or close quarters it has been necessary to place the shifter in neutral or reverse to control the acceleration. The dealer has had the car in his shop on three occasions. On the first occasion nothing was found. On the second occasion it was said that the fuel pump or its wiring harness were faulty and were replaced. On the present occasion it was thought that possibly this was a transmission problem. There have been mutiple episode and so only the last one is mentioned below.

The contact owns a 2004 Jaguar Xj8. While driving 5 mph the vehicle would not stop when the brakes were applied this caused him to crash into another vehicle. The road conditions were dry. The contact stated that there was damage to her bumper. The failure occurred on five occasions however only two resulted in a crash. The dealer was unable to diagnose the failure. The first failure mileage was 5,000 and the current mileage was 10,500 when turned in on 05/02/07. Updated 02-01-08 the consumer stated each occurrence transmission lost ability to downshift. The consumer further stated had software malfunction and battery had to be replaced twice. The consumer stated he was forced to pay off the last year of the vehicle as the dealer would not excuse him from the last year of payment. Updated 02/01/08.