Overdrive Servo

Overdrive Servo

Special Tools:

Special Tools

Removal
1. Remove the main control valve body.





2. NOTE: If the tool is not available, extreme care must be taker,` Spring pressure will force overdrive servo piston assembly out of case. Case bore damage may result from trying to pry on overdrive servo internal retaining ring.

Using the special tool, compress the servo spring to remove the overdrive servo retaining ring.





3. Remove the overdrive servo piston and return spring.

Installation





1. CAUTION: Do not drill out the overdrive servo bleed orifice to clean, or damage to the transmission will occur.

Some transmission cases will have this overdrive speed bleed orifice. If equipped with an overdrive servo bleed orifice, inspect for blockage. If the bleed orifice is blocked clean the orifice by using short bursts of compressed air to clean out the foreign material.





2. Install the overdrive servo piston assembly.
1 Install the overdrive servo piston return spring.
2 Install the overdrive servo piston assembly.





3. Use the special tool to install the overdrive servo piston retaining ring.
4. Install the main control valve body.