Jaguar XK8 owners have reported 2 problems related to power train (under the power train category). The most recently reported issues are listed below.
Would not start, battery run down in less than one week. Stationary.
See
all problems of the 1998 Jaguar XK8
🔎.
After slowing the car, the transmission downshifted in a harsh, sudden manner, and then the car accelerates abruptly and surges forward with a "clunking" sound. An amber warning was displayed on the dash saying "gearbox fault". If someone was in front of the car when it surged forward they might have been struck.
See
all problems of the 2003 Jaguar XK8
🔎.