727 3rd gear feels more like a down shift

Started today. When I shifted into 3rd if either was very slow to engage or almost felt like a down shift. When cruising slow speed it actually slowed the car down and didn't want to accelerate. Any ideas?
Rebuilt 5k miles ago. Clutches, bands, seals, bushings, sprag, servos, all new. Fluid is fresh and not burned. Thanks for the help.