Thought I would share some stuff on Rubberbandit's (Chad) 4L80E build, Most people never get to see what actually goes into building their transmission. This is going behind a stock LS3 but will handle A LOT more when I'm done!
It's a 2003 4L80E out of a Express Van, REALLY nice core! It could have been put in just like it is & easily handle a LS3.....That's how good of shape it was in!
Got the Case cleaned up, Ran it through the Hot Water Vat twice, A little Iron staining on the lower half of the Case, I can paint this if you want Chad.....But I would leave it be, Your call??