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So I've decided to upgrade my tranny. I'm replacing the direct drum with the stronger 4l80 drum with the good sprag. I'm also running a Tbrake so I need the bleed hole behind the piston. The drum has what looks to be a bleed hole already, is this really what it looks to be here in this pic? Was tired of short shifting to be easy on the roller clutch.
I did the same as you wth the 80e drum/sprag and drilled a second as per my instructions
Yea, I went ahead and pulled the piston and drilled another hole. Was just trying to avoid pulling the piston, but as it turns out....I cant use that piston anyway.
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Upgrading my th400 
