727 shifting into third slow

Rebuilt trann
oldkimmer said
...............is this a rebuilt trans or a used 1 with the kit installed............r u sure that u don't have severe overlap where 3rd is on way b4 2nd is released........who installed this kit..........does whomever comprendee the instructions.........kim........
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new build
Last year. No problems last year. New motor and put it back together. Took it to the track and started acting up on the way. I had it out for just some short runs around town and worked fine.