Slipping 4TH Gear

SLIPPING 4th GEAR
1. Overdrive circuit leakage or blocked passage.
2. Overdrive servo piston and/or band not applying.
3. Overdrive band mislocated.
4. Converter damper plate and hub fracturing, the weld and/or rivets fatiguing, or the damper springs breaking.
5. Distorted direct driveshaft splines.