Q: transmission ffaul light on 1999 Jaguar Vanden Plas

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WHen accelerating it feels like the transmission is slipping then it feel like a knock of some sort.. then after a stop and trying to accelerate again it vibrates the whole car and then it says on the dashboard "transmission fault" then after it marks transmission fault the next time i take off it takes of really really slow and the after i hit above 30 miles or so it accelerates normally.. What does it mean? Or better yet what do i need to do?
(2) Answers
Really need to have your Automatic Transmission inspected, which includes the computer that controls it.

here is an article that we at RepairPal put together to help you with this process
That transmission is known for electrical failures. You should bring it by for a free diagnostic check. At Mr. Transmission we road test and scan the computer for free.