Changed alternator now feels like it slipping

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. I do not know of anything that would change by changing the alternator itself. However, I'd look at what was necessary to remove and reinstall to access the alternator. Was everything reassembled as needed? Wiring? Air intake parts, if applicable? Hoses and connectors? That's what I would be looking at. Are there any warning lights illumunated? You may need to reach out to a shop near you for some assistance -- https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.