From OD or D to 1 at 55 MPH/Coasting, Shift to 1ST Over 45 MPH

FROM OD OR D TO 1 AT 55 MPH/COASTING, SHIFT TO 1ST OVER 45 MPH
1. Main control pressure malfunction.
2. Sticking or dirty valve body.
3. Governor damaged or worn.
4. Improperly adjusted or sticking kickdown linkage.