Sonnax 122740-01K B1/B2 Apply Control Plunger Valve Kit for Aisin AS66RC AS69RC

The Sonnax 122740-01K B1/B2 Apply Control Plunger Valve Kit is a drop-in Zip Valve solution designed to restore hydraulic control in Aisin Seiki AS66RC and AS69RC automatic transmissions. This kit addresses bore wear issues in the B1 or B2 apply control plunger valve sleeve locations that can cause serious transmission performance problems.

Common Problems This Kit Solves:

• Shift flares (especially 1-2 and 5-6 shifts)
• Delayed or harsh Forward and Reverse engagements
• Low line pressure conditions
• Burnt B1 and B2 clutches
• Cross-leak between line pressure and Reverse pressure

Key Features:

• Hardcoat anodized aluminum plunger valve combats premature wear
• Upgraded sleeve material is highly wear-resistant to increase service life
• Extended sleeve/plunger valve engagement provides better stability and durability
• Drop-in Zip Valve design installs quickly and easily without special tools
• Works at either B1 or B2 apply control plunger valve location

How It Works:

Line pressure is routed to the B1 and B2 plunger valves to aid in proper apply control of the B1 and B2 clutches. When the sleeve wears at the B1 location, line pressure exhausts, resulting in shift flares and burned clutches. At the B2 location, wear creates a cross-leak between line pressure and Reverse pressure, causing engagement issues. This Sonnax kit restores proper hydraulic integrity at either location.

Application:

Designed specifically for Aisin Seiki AS66RC (gas) and AS69RC (diesel) 6-speed automatic transmissions commonly found in Dodge Ram trucks with Cummins diesel engines and select other applications.

Sonnax Zip Valve kits are engineered for professional transmission rebuilders and repair shops seeking reliable, long-lasting solutions to common valve body wear problems.