2007 4R75E valve body rebuild
#1
2007 4R75E valve body rebuild
rebuilt this valve body for a 2007 transmission. The engine is NA but has a few bolts ons. Since its wasn't a daily driver, the customer requested a very firm shift.
The pressure regulator valve was moderately worn, it was replaced with a new valve from Sonnax.
The boost valve and OD servo regulator valve were replaced as well
The end plug on the 2-3/1-2 shift valves usually wears and causes a pressure leak, a new plug with an o-ring is installed to prevent pressure leaks and sloppy 1-2/2-3 shifts
The stock separator plate was replaced with a Superior Tuff plate and drilled to Jmod spec;
hole 1 drilled to .161"
hole 2 drilled to .116"
hole 3 drilled to .180"
hole 4 & 5 drilled to .116"
hole 6 drilled to .161"
hole 7 drilled to .089"
hole 8 not used for this application
hole 9 & 11 drilled to .125"
hole 10 drilled to .089"
The pressure regulator valve was moderately worn, it was replaced with a new valve from Sonnax.
The boost valve and OD servo regulator valve were replaced as well
The end plug on the 2-3/1-2 shift valves usually wears and causes a pressure leak, a new plug with an o-ring is installed to prevent pressure leaks and sloppy 1-2/2-3 shifts
The stock separator plate was replaced with a Superior Tuff plate and drilled to Jmod spec;
hole 1 drilled to .161"
hole 2 drilled to .116"
hole 3 drilled to .180"
hole 4 & 5 drilled to .116"
hole 6 drilled to .161"
hole 7 drilled to .089"
hole 8 not used for this application
hole 9 & 11 drilled to .125"
hole 10 drilled to .089"
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