1+ Spring  
2+ Retainer  
3+ Servo piston pin  
4+ Servo ring  
5+ Servo piston  
6+ Oil seal  
7+ Accumulator spring  
8+ Band pin  
9+ Servo spring  
10+ Ring  
11+ Piston  
12+ Oil seal accumulator ring  
13+ Gearbox gasket and seal kit  
14+ Servo piston  
15+ Snap ring kit  
16+ Cover gasket  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.