727 shift probs

Type F is the wrong fluid for a Torqueflite. While it can be used, it is not the Chrysler preferred fluid. Dexron is.

That said, I don't think what you have is fluid related. Sounds like it was going to happen anyway and the fluid is simply a coincidence.

Type F has been used for years to make a Dexron fluid type transmission shift harder......and it will, but it is still not the correct fluid. I have always said people looking for a harder shift in a Dexron transmission with Type F were doing it the wrong way. I still maintain that.

If it slips with Type F, it will slip with Dexron. Slipping is an indication of a mechanical failure, or of a needed adjustment. Hopefully, the latter will fix it.