Band Servo Piston Assembly

COMPONENTS

DISASSEMBLY




1. Remove band servo piston snap ring.




2. Apply compressed air to oil hole in transmission case to remove OD servo piston retainer and band servo piston assembly.
- Hold band servo piston assembly with a rag or nylon waste.




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




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




5. Remove O-rings from OD 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 OD 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.




Inspection standard: Refer to SDS, AT-310.ZZZZ

ASSEMBLY




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




2. Install band servo piston stem, band servo thrust washer, OD 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 ATF 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 OD band servo piston.
- Apply ATF to D-ring.




7. Install O-rings to OD servo piston retainer.
- Apply ATF to O-rings.
- Pay attention to the positions of the O-rings.




8. Install OD band servo piston to OD servo piston retainer.




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




10. Install OD band servo piston assembly to transmission case.
- Apply ATF to O-ring of band servo piston and transmission case.




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