No power mainly when going up hills and small mountain ranges

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No check engine light. No codes come up in computer. If I give it too much gas the transmission doesn't want to change out about 40 MPH. Going up hills, I can be driving 60 MPH and it will bog down to 20 MPH and start jerking. I replaced the catalytic converter and it didn't fix the problem. It does use about a quart of oil during oil changes. 2010 Nissan Altima 4 cylinder