• Delayed engagement
  • Excess heat
  • Flare shifts & bind-ups
  • Harsh engagement
  • Harsh shifts
  • Slipping gears
  • TCC apply & release concerns
  • Soft shifts


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


Zip Kit seals critical pressure losses. Drop-in parts install quickly and easily.


Zip Kit®
Part No. 6R140-ZIP

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Sonnax Zip Kit 6R140-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in Ford 6R140 valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, solenoid regulator, reverse, clutch control, TCC and solenoid apply circuits 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 Apply Boost Valve Kit
  • Retainer For '17-Later Only
  • O-Ringed End Plug Kit
  • Internal O-Ringed End Plug Kit
  • Accumulator Pistons (3)
  • Converter Limit Valve, Sleeve & Spring
  • Accumulator Springs (3)
  • Bypass Blocker Valve For '17-Later Only

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 6R140 Valve Body Layout

Ford 6R140 Valve Body Layout
  • 6R140 Zip Kit® 6R140-ZIP


Zip Kit® Video - The First Step in Correcting Common Shift Problems
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