I have a nightmare of a car, mechanic or both! I have a 2000 Jaguar S-type 3.0 with 150,000 miles (I know). I had my Transmission rebuilt. After I got home, 2 weeks later my Transmission with almost identical transmission issues as everyone else. It slips and the RPM's go up to a 5. I took back to the Transmission shop, he did an engine check and gave me a list of things I needed to do and that its my engine and Transmission is working fine. I took to other mechanic he replaced coils, spark plugs, oil, cracked water reservior tank, hoses, and thermostat sensor. I got it back last week drove it 5 days and its back to doing the same thing. I dont know who to believe, is it my Transmission (Mechanic says they put on a machine and the celinoid is messed up). The Transmission shop is telling me I have to fix everything on my engine before myTransmission works properly and mechanic says engine has nothing to do with the Transmission slipping....Help a Single & Broke girl that knows every problem this Jag has to offer.