transmission is not working in reverse mode. Any advice is welcome on 2002 Jaguar S-Type

Auto, 70,000 miles, All gears work except reverse. Reverse indicator light comes on. No early indications of a problem. No dipstick to check trans. oil level.

Asked by for the 2002 Jaguar S-Type
its probably not worth fixing.had the same problem, cost me alittle over a grand. had to junk the transmission n put a used one on