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My daughters 1993 Mercury Capri, N/A, Auto Trans
Doesn't go to 4th gear.
Sounds like it's been doing this for awhile.
When I test drive, it briefly drops from gear 3 to 2 on rare occasions.. not like when you punch the accelerator. This doesn't happen on all test drives.
Trans Fluid is at operating level.
Where would you begin looking?
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