Ford Transmission Help (Sorry My Truck Is Not A Mopar At This Time...)

Well I took my truck and paid $60 to have a transmission shop diagnose it. There's nothing wrong with the electronics like I was thinking/hoping it might have been. Once they road tested it with their equipment hooked up they discovered the transmission is not able to shift into 3rd gear. The mechanic said one of a few things could be wrong, either something is not put together correctly on the onside or something is broken.