i have an interesting problem. On some days my truck shifts great and really smooth and on other days its really hard even when its warmed up. My clutch is original i havent messed with any of that just the tranny fluid. It does make a whinning sound. its my throw out bearing i know but when i go up a hill it has a funny sound.

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04 Mazda B4000 85k daily driver
99 Grand Prix (date car)
94 Ford Ranger (fixer upper)