• Loss of shift solenoid control pressure
  • Erratic line pressure
  • Pressure loss
  • Poor shift quality
  • Various shift concerns
  • Burnt clutches
  • Low converter & lube flow
  • Park release issues
  • Overheating


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.

9T45, 9T50, 9T60, 9T65

Zip Kit®
Part No. 9T45-ZIP

View Instructions Find a Distributor

Sonnax Zip Kit 9T45-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in GM 9T45/50/60/65 series valve bodies. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, clutch apply control and parking circuits. The kit also seals multiple circuits known to suffer from end plug leakage. 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 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
  • Checkballs (16) .250" Dia.
  • Solenoid Stabilization Clip Inserts (4)
  • ETRS Mode 2 Boost Valve Kit
  • Pressure Regulator Boost Valve Kit
  • Signal Damper Piston Kit
  • O-Ringed End Plug Kit

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.

GM 9T45, 9T50, 9T60, 9T65 Valve Body Layout

GM 9T45, 9T50, 9T60, 9T65 Valve Body Layout
  • 9T45, 9T50, 9T60, 9T65 Zip Kit® 9T45-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