Center Support mods.....
Machined off the Sealing Ring Lands between the 3rd & Reverse Circuits (Part of the Dual Fed Direct Clutch mod) Most builders just omit the Sealing Ring which is OK, But this helps with 3rd/Direct Clutch release times during Forced & Commanded Detent/Downshift.
Replaced the Plastic "Step Cut" sealing rings with solid Teflon like found on earlier 4L80E's. They seal better, But it takes special tools to install them correctly.
Before & After....
