Accumulators and Servos

Disassembly and Assembly

2-3 Accumulator

Install new seals on the accumulator piston and lubricate. Ensure the diagonal cuts are properly aligned.

Item	Part Number	Description
1	7F249	2-3 Accumulator Valve Large Seal
2	7F250	2-3 Accumulator Valve Small Seal
3	7F251	2-3 Accumulator Valve
4	7F285	2-3 Accumulator Valve Return Spring
5	7B264	2-3 Accumulator Retainer

Low-Reverse Servo

Inspect the sealing edge on both the servo cover and the apply piston. Replace the cover or piston, if necessary.

NOTE: The length of the rod attached to the piston may vary in length from transmission to transmission. Three possible lengths may be encountered. A single groove rod indicates the shortest possible length, while two and three groove piston rods indicate successively longer rods. For assembly purposes, it is important to determine which length piston rod was used in the manufacturing of the transmission.

Overdrive Servo

1. Pull the overdrive servo piston out of the piston cover.

2. Install new seals on the piston and cover.

3. Lubricate the piston seal with transmission fluid to prevent damage and to facilitate assembly.

4. Install the piston in the cover.
   
   
   
   
   

   Item	Part Number	Description
   1	388216	O/D Servo Retaining Ring
   2	7F204	O/D Servo Cover
   3	388515	O/D Servo Cover Seal Rings (2 Req'd)
   4	7F200	O/D Servo Piston
   5	7F201	O/D Servo Piston Return Spring
   6	—	O/D Servo Piston Seal Ring, Part of 7F200 Servo Piston