get the garage to check the fluid level.
...Get it down to N&S Jaguar 62b Thornes Lane, Wakefield, WF1 5RR, (01924 831140) and get it put on the diagnostic machine.
Ask for Stuart Redhead.
http://www.nsjaguar.co.uk/
2000 car, so Ford 5R55N box which uses the common and very cheap Dexron III iirc.phone the mechanic as quickly as possible to find out what fluid they put in because if it the wrong type you will have problems but 40 pounds a litre is very expensive for lifegaurdfluid 6. I just looked on the internet and I can get for 20 pounds a liter.