Acted like I was in low gear on interstate.

The only advice I can give you is to have testing performed. Nobody here could guess at any component until any testing is done. I must tell you, that it's unlikely for you to have a single component replaced that will solve all of your problems. It sounds like diagnostic testing must be performed to find out if there is on the off chance a concern electronically, or if the concern is instead a problem with a hydraulic internal component. Sounds more internal component to me, unfortunately. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops