• 3-4 Clutch failure
  • Code 894, 1870
  • Overheated converter
  • No 3rd
  • Delayed Reverse


Overheating and manufacturing flaws cause sleeve rotation and block oil flow, which leads to transmission failure.


Replace worn or damaged stator shaft with Sonnax stator support shaft assembly.

4L60-E, 4L65-E, 4L70-E

Stator Support Shaft Assembly
Part No. 77918S-08K

298mm Converter, reluctor style

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Sonnax stator support shaft assembly 77918S-08K for GM 4L60-E, 4L65-E and 4L70-E transmissions eliminates sleeve rotation by securing the sleeve in place with Loctite®. The assembly is 100% leak tested by Sonnax to ensure a secure seal. Shafts have slotted bolt holes for easy alignment during installation.

  • Slotted bolt holes for easy installation
  • No machining required
  • Bushings installed
  • Stator Support Shaft with Bushings Installed 6.830" Long
  • 4L60-E, 4L65-E, 4L70-E Stator Support Shaft Assembly 77918S-08K