Sometimes the tranny slips when accelerating from a stop light/sign

Hello, when you say the transmission slips, do you mean it allows the engine to rev even in gear to 5,000 - 6,000 RPM and have no power? If so, sounds like an internal transmission concern. Check fluid condition and level first, yes, but most often it's beyond that. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops