Build thread for rebuilding the 6L80

[TimC]

I mean for the pump kit..... many times they dont understand exactly which seals and orings go onto the pump stator shaft.... many times they mix the wrong stator and orings/ring seals... Service and the dealers have made mistakes on this... heck for mine they gave me the wrong ring seals..... they appear correct but will not work correctly on the shaft I got...

the new design has deeper grooves in the stator shaft and include orings that go under the new designed ring seals(original design didnt include orings... only ring seals..)... the new design also requires different ring seals than the first design even though the old ones appear to fit the will not work correctly. just hate to see someone get wrong parts...

Ahh, I see now. I ordered the stator kit and a set of the 2nd design seals just in case the stator kit didn't come with them. I was not aware of the deeper grooves in the new design.

Are you going to do anything to raise line pressure? Since Circle D was in there maybe they already did it. I am surprised that their trans couldn't take 550rwhp though.

[TimC]

I found instructions for installing the updated seals correctly. pg 2-11

https://www.gmasepbsep.com//GMASEPDO...8_R1.00_PG.pdf

[gr8lover]

Ahh, I see now. I ordered the stator kit and a set of the 2nd design seals just in case the stator kit didn't come with them. I was not aware of the deeper grooves in the new design.

Are you going to do anything to raise line pressure? Since Circle D was in there maybe they already did it. I am surprised that their trans couldn't take 550rwhp though.

Yea they did raise line pressure.... and their trans has no issue holding 550rwhp..... they can hold much more than that... I would guess they could hold 750rwhp easy..... Mine went due to a freak issue... (my output carrier hub snapped off... no one upgrades the output carrier hub!!-- it was just a 1 in a million issue)... They rebuilt it again and its all good....... I just decided to go a different route..... looking at something to hold 850rwhp without issue.... and thats why I went to a built 4L80..... 6L80 are greats trans....(we are making 2000/day... ) but the 4L80 will hold more power and no one can dispute that.... I just needed it to hold more than its capacity even built up.... sure there are guys making that power, but they will have to rebuild every yr or two... and I am done doing that...

[Posidon42]

Woot! The pressure plates and the 1-4 clutches are on their way back to me! Still won't be able to work on it until this weekend though. This is going to be a long week.

[Posidon42]

...but they will have to rebuild every yr or two...

Guess I will keep my tools then

[mooredata]

Cool nice job.

[gr8lover]

I found instructions for installing the updated seals correctly. pg 2-11

https://www.gmasepbsep.com//GMASEPDO...8_R1.00_PG.pdf

Nice.... the big thing is to make sure if you have the new pump stator with the grooves with the alignment notches or not... if you have the notches then use oring and newer designed ring seal..... if you dont have the alignment notches/locators then you need to use NO oring and use the old style ring seal and with this setup you need to align the ring seal a certain way(marking all the same way--- the thoery is that the way they mold the ring seal that it will seal better if all the mold extraction points all face the same way....... I like the oring/ring seal with alignment/locators on the stator shaft design much better.....

[TimC]

Nice.... the big thing is to make sure if you have the new pump stator with the grooves with the alignment notches or not... if you have the notches then use oring and newer designed ring seal..... if you dont have the alignment notches/locators then you need to use NO oring and use the old style ring seal and with this setup you need to align the ring seal a certain way(marking all the same way--- the thoery is that the way they mold the ring seal that it will seal better if all the mold extraction points all face the same way....... I like the oring/ring seal with alignment/locators on the stator shaft design much better.....

Hopefully I got the better design. That's half the reason I ordered the parts. I got the part number from a post on here I think.

I got my backing plate machined today so I can at least put the 35r drum back together and install it. My dealership parts should be here tomorrow.

I can't get a hold of the Australians so I'm not sure what to do about raising the line pressure via the regulator spring.

[GT Drew]

Failure of the of the drum shafts is not uncommon. There are shops that can reinforced the drum to shaft. Replacement intermediate shafts are also available. img2.jpg

[gr8lover]

Failure of the of the drum shafts is not uncommon. There are shops that can reinforced the drum to shaft. Replacement intermediate shafts are also available. img2.jpg

Your not mentioning this due to my posts are you?.... your right about being able to help many of the drums/shafts but the one you are showing is best if fully billet like Circle D makes special... and this one shown is a common one that breaks.... as for my issue no one reinforces the output carrier hub...