Hits bump, loses power

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My 2005 1kd ftv loses power when i hit a bump, no lights in dash, no fault codes. I have to move the shifter to L to get enough power to keep moving forward, after 5-10 secs its normal again. Any ideas what's wrong?

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Tricky one. Need to try to determine if its Electrical / Engine / Fuel / Trans related... Any other symptoms?

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Trans that shifts hard, nothing else.. I'm stumped.