Rebuilding 4l60e and the pump stator support has three light scores on the inside where the sealing rings land. Is it practical to change the stator or pump cover? The body is in good shape. Transmission code says this is from a 06 4.3 truck or van but it's in an 05 5.3 avalanche. What pumps will work in this transmission. What I have is a 300mm input shaft non o-ring arrangement with no reluctor on the shaft. Will a newer ISS plugged pump cover from an 07+ year model work here? Sonnax lists a stator for 2004+ but they specify it's for a reluctor type shaft.

Brian

 

If your 4L60E Transmission is of the 2005 or 2006 Model year...
Then the Input-Shaft may be a particular (and uncommon) version... the "Late" 300mm Input-Shaft but missing the ISS Reluctor Teeth.
This type of Shaft Looks like the "Early" 300mm Input-Shaft...
However the location of the Teflon Sealing Rings has been moved slightly inward so that Reluctor Teeth would fit (even though there are none).








If the Transmission uses this uncommon Input-Shaft...
The Pump will use a ISS Stator Support Tube; but with no Sensor... Just a dummy Plug.
If you see this, then a replacement Stator Support Tube or Rear Pump Half, must be the ISS version of the Parts (even without using ISS).



If this is not the case; then use the "Early style 300mm" Stator Support Tube or Rear Pump Half.

Generally replacing the Stator Support Tube, is all that is needed.
However, a shop Press is required to press the Stator Support Shaft out of the Rear Pump Half...
and to remove and replace the two Bushings, that are inside the Stator Support Tube.

In order to avoid needing a shop Press; many people obtain a new (Re-manufactured actually; new replacements are not produced) complete Rear Pump Half.
The Rear Pump Half will have a Stator Support Tube and Bushings already installed.
Then only a Pump alignment Clamp is needed to align the Front and Rear Pump Halves, to be bolted and torqued together.

The last concern with replacing the Rear Pump Half... is making sure to use the correct type of Pump to Case Seal.
The early units would use a "Lathe Cut Seal" (looks like an O-Ring with a square edge).
The late units would use a Metal-Clad Seal.

Good Luck and have fun!

 

Thanks for clarification. I made an educated guess and ordered a pump albeit a later pump took a chance with not knowing. I measured from the thrust bearing to the top sealing ring and compared it to the likely landing spot on the stator. The stator holes will be centered between the rings. The input shaft looks like the reluctor teeth just weren't ground. I'm pretty confident it's the mid year version.

Thanks
Brian