Interested -definitely

 

When ordering from lee, be sure you're ordering the proper material.
Wrong material and your spring will lose its temper and once that happens, you'll have all kinds of line pressure issues

 

yes, you'll want to spec oil-tempered chrome silicon

 

I never fail to learn something new from you guys, thank you.

 

I don't have much to offer in terms of personal automatic transmission experience and have to admit that a lot of this is over my head. However, my technical curiosity is getting the best of me and I know that this thread will continue to be a real asset to those (like myself) who want to educate themselves, especially years down the road. Thanks for taking the time to compile the information, it is much appreciated.

 

I recently used that Superior kit myself. the stock valve is on the left and the new Superior valve on the right. The width of the flat spot is approximately .156-1.87.

 

My last Posts involved enlarging the Orifice/ Hole size for Lube-Oil at the back of the Stator Support Tube and the Overrun Drum.
Doing so will increase Lube-Oil to the Over-Drive Gear-Set, the Over-Drive Clutch assembly, the Overrun One-Way Roller-Clutch, and the Overrun Clutch assembly.
for all model years of the 4L80E Transmission.

Next we are looking at the Orifices/ Hole sizes for the Reaction Gear-Set, the Output Gear-Set, the Intermediate Sprag, and the Intermediate Clutch assembly.
Below is an image of the 1991 - 1996 Sun-Gear that is shared for both the Reaction Gear-Set and the Output Gear-Set:

Pay attention to the amount of space in the center of the Sun-Gear with no Teeth...
as well as the size of the Lube-Oil Orifice shown.

For the 1997 and up model year 4L80E units, this Lube-Oil Orifice was made significantly smaller.
The images below are of the 1997 and up Sun-Gear:






The images are not great in terms of showing the smaller Orifice size...
The 1997 and up Lube-Oil Orifice in the Sun-Gear is ONLY approximately 0.065" - 0.070".

This Late design Sun-Gear was used with the change to using a solid Intermediate-Shaft as discussed earlier in this Thread.
On paper, the reduced hole size would better help Lube-Oil pass between the outside of the Intermediate-Shaft and the inside of the Sun-Gear Shaft.

When using the Late Lube-System (1997 and up)...
This Orifice should be enlarged/ duplicated.
The image below shows this orifice enlarged with an electric cut-off tool/ grinder with a thin disc:


There is not ample space to drill the orifice larger...
So instead drill through the Orifice with a small (NEW Carbide) drill-bit that fits in the hole; and pass through the other side of the Sun-Gear Shaft..
making a second small hole for the Lube-Oil.
When done, the Sun-Gear should have two slots cut into the center of the gear.
These slots should look the same as in the image above (about 0.250" wide holes).

 

I just wanted to take a minute to say thank you. As someone you have helped advise on here in the past, as well as Maroonmonster and Clinebarger, the 3 of you have helped myself, and my friend, learn, understand and build a few transmissions. My quest for knowledge is awake everyday, and I enjoy the knowledge you choose to share, and the education you provide. Thank you sir!

 

In the 1997 and up 4L80E units (Late Lube-System)...
The Orifice for Lube-Oil was reduced also; just like the Sun-Gear Lube-Oil Orifice.

Below is an image of the Center Support:



The next image below indicates the location of the Lube-Oil orifice:



The orifice shown above, should be drilled/ enlarged to 0.125" before a new Bushing is installed.
Metal debris will stay in the Center Support if the new Bushing is installed before enlarging the orifice.
After cleaning; blow through all of the different holes/ passages of the Center Support...
Including the 3 passages/ holes shown in the image below:



And MOST importantly, clean and blow-out the large hole that the Cooler Return Fitting goes into (This passage is only found on 1997 and up units), shown below at the bottom of the image:


So remove the old Bushing, drill the Orifice to 0.125", clean the Center Support as best as possible, blow-out all passages, and install the new Bushing.

Lastly, here is an image showing both the Early Lube-System Center Support and the Late Lube-System Center Support.
The Center Support towards the TOP of the image is the Late design...
and has the Port/ Hole for the Cooler Return Fitting.
The Early design does not have the Port/ Hole, and is the Center Support towards the bottom of the image:

 

One very easy way to improve the Late Lube-System (1997 and up) is to replace the SOLID Intermediate-Shaft with a HOLLOW Intermediate-Shaft from a 4L80E that has the Early Lube-System.
This change of Intermediate-Shafts will increase Lube-Oil through the center of the transmission to the back of the transmission.

This section of the Lube-System is responsible for lubricating components from the Forward Clutch all the way back to the Bushing that the Output Ring-gear sits in...
shown in the image below:



It is also common to replace the fluted Sun-Gear Shaft Bushings with the non-fluted Bushings used in the Early (1991 - 1996) 4L80E.
The non-fluted Bushings tend to last significantly longer...
and with Lube-Oil passing through the center of the Intermediate-Shaft; fluted Bushings are no longer needed.

As I have said many times... I personally use the fluted Bushings; but ONLY with the Dry-Lube Coated, Babbit Steel Bushings from Durabond.

 

Next I will be discussing Late design Lube-System modifications that expand from the use of a Hollow Intermediate-Shaft...
just as I was talking about in my last post.

This will cover the Center section, and Rear section of the Late Lube-System.
The Front section will come later on.

 

Thank you!

 

thank you for the fair warning, i will now commence to hoarding type 2B cases and eliminate my crypto coin holdings

 

LOL!

When ever I tell people about the Front section modification to the Lube-System...
They usually go and grab a bunch of those Cases!


Don't forget to replace the Original Pump with a Universal Pump.

 

Early output (or if you have REALLY good drill bits...drill the stock output) for a lube hole. Plug the case and vb to eliminate the lube tube.


You now essentially have the same lube circuit as the early 80e but the lube comes from center support back instead of output shaft forward.

 

with the added benefit of leaving the AFL circuit alone and not stealing lube oil from it

excellent

 

Hey, I was getting to that!

 

I just wanted to give an appetizer and you can deliver the main course

 

in this configuration, will I use an oil grooved or plain bushing in the output shaft to output ring gear?

 

This Bushing?




Usually, only the Narrow Bushing will fit.