when i put the tracker in drive it has no power but plenty of power in low

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When i put the tracker in drive it has no power, it will pull out but when you give it more gas it does not respond. It has plenty of power in low and reverse. I am showing codes PO758 and PO743. I have changed the shift selenoids and it has not helped. At one time it was showing shift selenoids A&B.The tracker has been wrecked and I had to replace some of the wires in the front of the radiator support. Any help would be appreciated