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I have a 1997 Ford e 350 van with automatic transmission when the transmission shifts form 3rd gear to overdrive at about 50-55 mph it falters and bucks and I have to let off on the gas so it can pick-up speed, when I have overdrive off and put on overdrive when 3rd gear shifts to overdrive at 50-55 mph it shifts smoother but if I give too much gas again it bucks and falters till I let off gas so it can retain speed slowly.

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12y ago

What else can I help you with?