• Burnt clutches
  • Delayed engagement
  • Inadequate lubrication
  • Low pressure
  • Slips & flares
  • Soft shifts
  • TCC apply & release concerns
  • TCC codes


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.

6F35 (Gen. 1), 6F35 (Gen. 2), 6F35 (Gen. 3)

Zip Kit®
Part No. 6F35-ZIP

View Instructions Find a Distributor

Zip Kit 6F35-ZIP targets the root cause of multiple concerns by sealing critical circuit pressure losses in the Ford 6F35 Gen. 1, Gen. 2 and Gen. 3 valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, clutch apply control, solenoid feed, compensator feed and lockup control circuits. The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. No special tools are required for installing these parts.

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 information and locations at other key areas of the valve body.

  • Drop-in Zip Valve parts install quickly and easily, no reaming or special tools required
  • Uniquely designed parts address root causes of valve body concerns 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
  • Checkballs (3) .250" dia.
  • O-Ringed End Plug Kit
  • Control Pressure Regulator Valve Kit
  • Solenoid Damper Piston & Spring
  • TCC Regulator Valve Kit
  • Solenoid Pressure Regulator Valve Kit
  • Rivets (2) 1 Extra; Not Shown
  • AFL Balance Plugs (2) 1 Extra; Not Shown
  • Drill Bit Not Shown

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 6F35 (Gen. 1, 2 & 3) Valve Body Layout

Ford 6F35 (Gen. 1, 2 & 3) Valve Body Layout

  • 6F35 (Gen. 1), 6F35 (Gen. 2), 6F35 (Gen. 3) Zip Kit® 6F35-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