• TCC apply & release concerns
  • Overheated fluid
  • Various shift concerns
  • Delayed engagement
  • Burnt clutches
  • Lube failures
  • Loss of shift solenoid control pressure
  • Low cooler flow


Loss of oil pressure due to worn components in critical oil circuits.


Recover hydraulic control and restore normal shift operation by installing Sonnax Zip Kit. Drop-in parts install quickly and easily.

10L60 (Gen. 1), 10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80, 10R90

Zip Kit®
Part No. 10L80-G1-10R80-ZIP

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Sonnax Zip Kit 10L80-G1-10R80-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in Ford 10R60/80/90 and GM Gen.1 10L60/80/90 valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, TCC, and clutch apply control with no special tools required.

The Zip Kit quick guide provides clear and easy instructions on one sheet to get the unit sealed up and back on the road fast. In addition to general rebuilding tips and technical information, the technical booklet included in this kit contains vacuum testing and additional repair options for higher mileage units or for repairing specific complaints which are beyond the scope of this kit.

  • Drop-in Zip Valve™ parts install quickly and easily, no reaming or special tools required
  • Uniquely designed parts address root causes of valve body complaints by sealing critical pressure circuits
  • Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair

Learn More About Zip Valve™ Drop-In Repairs
  • TCC Priority Valve Kit
  • Main Pressure Regulator Valve Kit
  • TCC Signal Damper Piston Kit
  • LPC Signal Damper Piston Kit
  • Solenoid Stabilization Retainers (6)
  • TCC Regulator Valve Spring

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Ford 10R60, 10R80, 10R90, 10R140 Valve Body Layout

 Ford 10R60, 10R80, 10R90, 10R140 Valve Body Layout
  • 10L60 (Gen. 1), 10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80, 10R90 Zip Kit® 10L80-G1-10R80-ZIP
Sonnax Zip Kit

The Sonnax ZIP KIT®

The First Step in Correcting Common Shift Problems

It's easy to restore and extend vehicle shift quality with Zip Kits. Uniquely designed, drop-in Sonnax parts target the root cause of valve body complaints and stop critical circuit pressure losses in the most common problem areas of the transmission.

Learn More About Sonnax Zip Kits