From OD or D to 1 at 55 MPH Coasting, Shift to 1ST Under 15 MPH

From OD or D to 1 at 55 MPH Coasting, Shift to 1ST Under 15 MPH Kickdown Shift Speeds Too Early
1. Main control pressure malfunction.
2. Sticking or dirty valve body.
3. Low/reverse servo damaged.
4. Governor damaged or worn.
5. Overdrive clutch damaged.