C6

Fits clicker-style units, '76-earlier.

Symptoms:

• Soft shifts
• Poor shift quality
• Reverse shudder
• Direct clutch failure
• Low line rise

Cause:
Excess boost sleeve wear prevents proper line rise.

Correction:
Recover hydraulic control and renew line rise performance by installing Sonnax boost valve kit

When rebuilding high performance or heavy-duty Ford C6 transmissions, it is common to find a worn boost sleeve in the clicker-style valve body. This wear causes poor line rise, which results in erratic shift timing, Reverse shudder or direct clutch failure. This can be caused by the reciprocating boost valve wearing the inside diameter of the boost sleeve. When this occurs, oil that enters the modulated line pressure orifice leaks past the boost valve and exhausts through the Reverse orifice, resulting in poor or no line rise. The outside diameter of the boost sleeve may allow some leakage through the valve body, which can result in insufficient line rise. This Sonnax boost valve kit eliminates the above problems. Replace the boost valve and sleeve to restore performance and to reduce the chance of premature failure.

• Sleeve is manufactured from highly wear-resistant aluminum alloy
• Hardcoat anodized valve combats premature wear

Note:
A number of boost valve kits are available for this unit:

• Normal line pressure boost (gas ratio): Kits 46780K and 46784K.
• Increased line pressure boost (diesel ratio): Kit 46782K is recommended for all heavy-duty applications.
• Kit 46784K works in early model "clicker" with screw on boost valve end plate.
• Kits 46780K, 46782K and 46784K include O-rings to provide additional protection against both cross-leakage and oil exhausting through the valve body bore.

Contents:

• Valve
• Sleeve
• O-Rings (3)

SONNAX Installation Instructions