If the idea of dual feeding the clutch pack is to add more surface area on the piston to be pressurized doesn't drilling a hole in the chamber that is being pressurized bleed off the pressure?
Rebuilding a 4L80e, you think I will have any issues NOT drilling a bleed hole in the drum? I did dual feed as you described , but have seen others talk about drilling a hole but not explaining why it’s needed if I’m not running a trans brake
Keeps the piston from centrifugally applying the direct clutches when the transmission is in 1st gear and the direct drum is counter rotating 85ish% of input rpm. If you want your direct clutches to have the best chance at survival, drill the hole
It is not needed to do the dual feed. Dual feed just refers to how the fluid is applied to the direct piston. It (the 1/16” bleed) is not needed for a rebuild in an autoshift transmission that’s behind a stockish engine. Definitely required in anything performance or with a trans brake.
Good explanation. Thanks CV
Very well explained sir nice job!
Great video. Thanks for posting it.
Great explanation thanks
best explanation!!!
So effectively same as manual 3rd where direct drum is engaged also?!.
What happens to reverse pressure.
When you need to back up.
The holes been blocked now.
I’m just a passing through.
Thanks for sharing.
Larry
Thanks!!
thanks a lot
If the idea of dual feeding the clutch pack is to add more surface area on the piston to be pressurized doesn't drilling a hole in the chamber that is being pressurized bleed off the pressure?
The bleed hole is a negligible pressure loss
You better have dual fed my shit boss cus I’m sending it. 😎
Great video, now show us how you get 6 frikshuns in 80e direct pls
Rebuilding a 4L80e, you think I will have any issues NOT drilling a bleed hole in the drum? I did dual feed as you described , but have seen others talk about drilling a hole but not explaining why it’s needed if I’m not running a trans brake
Keeps the piston from centrifugally applying the direct clutches when the transmission is in 1st gear and the direct drum is counter rotating 85ish% of input rpm. If you want your direct clutches to have the best chance at survival, drill the hole
@@cameron878 will do , thanks 🙏
Also have got to drill a hole in the direct drum.......
It is not needed to do the dual feed. Dual feed just refers to how the fluid is applied to the direct piston. It (the 1/16” bleed) is not needed for a rebuild in an autoshift transmission that’s behind a stockish engine. Definitely required in anything performance or with a trans brake.
@@cameron878 shit I did one today that way. Stock truck. Will it burn up the direct clutches?
@@Jearl_Black probably be fine. Giving it more line pressure helps