Band Servo Piston Assembly

DISASSEMBLY




1. Remove band servo piston snap ring.




2. Apply compressed air to oil hole in transmission case to remove O.D. servo piston retainer and band servo piston assembly.
- Hold band servo piston assembly with a rag.




3. Apply compressed air to oil hole in O.D. servo piston retainer to remove O.D. band servo piston from retainer.
- Hold O.D. band servo piston while applying compressed air.




4. Remove D-ring from O.D. band servo piston.




5. Remove O-rings from O.D. servo piston retainer.




6. Remove band servo piston assembly from servo piston retainer by pushing it forward.




7. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, remove E-ring.




8. Remove O.D. servo return spring, band servo thrust washer and band servo piston stem from band servo piston.




9. Remove O-rings from servo piston retainer.




10. Remove D-rings from band servo piston.

INSPECTION

Pistons, retainers and piston stem




- Check frictional surfaces for abnormal wear or damage.

Return springs




- Check for deformation or damage.
- Measure free length and outer diameter.

ASSEMBLY




1. Install D-rings to servo piston retainer.
- Apply A.T.F. to O-rings.
- Pay attention to position of each O-ring.




2. Install band servo piston stem, band servo thrust washer, O.D. servo return spring and spring retainer to band servo piston.




3. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, install E-ring.




4. Install O-rings to servo piston retainer.
- Apply A.T.F. to O-rings.
- Pay attention to the positions of the O-rings.




5. Install band servo piston assembly to servo piston retainer by pushing it inward.




6. install D-ring to O.D. band servo piston.
- Apply A.T.F. to D-ring.




7. Install O-rings to O.D. servo piston retainer.
- Apply A.T.F. to O-rings.
- Pay attention to the positions of the O-rings.




8. Install O.D. band servo piston to O.D. servo piston retainer.




9. Install band servo piston assembly and 2nd servo return spring to transmission case.
- Apply A.T.F. to O-ring of band servo piston and transmission case.




10. Install O.D. band servo piston assembly to transmission case.
- Apply A.T.F. to O-ring of band servo piston and transmission case.




11. Install band servo piston snap ring to transmission case.