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    Drivetrain 4r70w Trouble

    I have a 1997 gt in oh which the engine jus got rebuilt. When I got the car back the shop installed MLPS wrong. Now that that is fixed here's the issue. 1) car won't shift 1-2 properly. In D it wants to over rev like crazy. Then when I let off the gas a little and drop the rpms it shifts. This...