• Harsh shifts
  • Burnt clutches
  • Pressure loss
  • Soft shifts
  • Flare shifts


Damaged, deformed and/or eroded end plugs and bores allow loss of critical hydraulic pressure.


Recover hydraulic control and renew crucial circuit pressures by installing Sonnax drop-in O-ringed end plug kit.

9T45, 9T50, 9T60, 9T65

O-Ringed End Plug Kit
Part No. 184740-03K

Fits both ETRS and non-ETRS valve bodies. Port configurations may change due to variations of casting channels.

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OE end plugs are designed to prevent critical pressure loss by capping the bore while also functioning as a spring or valve stop. Repetitive spring motion, valve impact and fluid pressure variations cause wear between the end plug and bore mating surface, allowing vital pressure to escape the circuit.

GM 9T45/50/60/65 valve body and pump have end plugs at various bores that are susceptible to the wear conditions described above. When pressure drops due to plug deterioration, assorted shift concerns can arise and burnt clutches often result in the affected circuit. Put an end to leaks, restore hydraulic integrity and renew shift operation by installing Sonnax O-ringed end plug kit 184740-03K.

  • Minimal end-plug-to-bore clearance with added O-ring for positive seal
  • Prevents loss of critical pressure
  • Reduces or eliminates leakage in eroded OE bores
  • Drop-in Zip Valve™ parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • End Plugs, Small (2) 14mm
  • O-Rings, Small (4) 12mm, 2 Extra
  • End Plugs, Large (3) 15.25mm
  • O-Rings, Large (5) 13mm, 2 Extra
  • 9T45, 9T50, 9T60, 9T65 O-Ringed End Plug Kit 184740-03K
  • 9T45, 9T50, 9T60, 9T65 O-Ringed End Plug Kit 184740-03K

You need this if...

9T45, 9T50, 9T60, 9T65 O-Ringed End Plug Kit Vacuum Test Locations