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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
The other day I was driving my car. I have an automatic by the way. I was accelerating extremely slow. When the car went to shift from first gear to second, it seemed like it was getting stuck and didnt know where to go. It was a loud knocking sound near where the transmission is. When I accelerate fast it doesn't happen. But even before when I used to accelerate slow this didn't happen. Why is this happening all of a sudden. I change my tranny fluid regularly. Should I try to add some Lucas oil transmission fluid to it? Please help.
Sounds like it's time for a tranny rebuild. Also, before anything else, get underneath your 'stang and check both, your front and rear u-joints, when's the last time that you replaced your u-joints?.