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Discussion Starter #1
New lip seals look different from the ones coming out of the 4l80e I'm rebuilding. Is this expected?

New ones have longer lips?

(Jake, Hutch, others) I know there is a lip/beef curtain joke here but I'm sure such pros are far too mature and wouldn't find that funny.

Here is a pic. Top seal from WITTrans, old from rebuild. The new ones fit great and seem to perform OK so far. Sorry for the crap photos. Silly question but I'm learnin here.

 

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thats what we have been seeing at the dealer no problems . have to use the flat lip seal tools and not the wire .. as the wire gets hung up
 

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Discussion Starter #3
thats what we have been seeing at the dealer no problems . have to use the flat lip seal tools and not the wire .. as the wire gets hung up
Ahh, good to know. I knicked an extra seal with my wire tool but got the second one in without issues. I'll find a flat lip seal tool as these new ones are definitely a tad harder to install.
 

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Ahh, good to know. I knicked an extra seal with my wire tool but got the second one in without issues. I'll find a flat lip seal tool as these new ones are definitely a tad harder to install.
SmartWater bottles make the best seal stuffers. :)

Anymore, all the kits seem to have one (big green round disc) but they're a little thick for some pistons with tight clearance (AODE) X-Ray film works too. Good luck.
 

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Long seals work with an undercut piston.
Look at the piston. If one land is longer it will use a longer seal.
Same size lands use a short seal.
 

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Discussion Starter #6
Long seals work with an undercut piston.
Look at the piston. If one land is longer it will use a longer seal.
Same size lands use a short seal.
I'm not really following you though. ATRA, ATSG and other online sources don't talk about any 4l80e piston changes except for the transition to bonded pistons. The long lip seals don't appear to be able to bottom out and deform because of extra material on land and 3 feet on the bottom of the piston.



In any case short old ring on piston:


The land:
 

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Discussion Starter #7
SmartWater bottles make the best seal stuffers. :)

Anymore, all the kits seem to have one (big green round disc) but they're a little thick for some pistons with tight clearance (AODE) X-Ray film works too. Good luck.
Thanks for the tips!
 

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My advise is to upgrade to molded pistons. Those early aluminum pistons are prone to break. I never reinstall them.
 

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They fit early units. You also should be updating the cushions when you do this as they are also prone to break. Check your clutch pack clearances & make sure they are correct when you do this.
The later plastic sealing rings work just fine as well. Before they came out with the molded pistons I would swap them out with turbo 400 apply pistons.
 

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Discussion Starter #11
They fit early units. You also should be updating the cushions when you do this as they are also prone to break. Check your clutch pack clearances & make sure they are correct when you do this.
The later plastic sealing rings work just fine as well. Before they came out with the molded pistons I would swap them out with turbo 400 apply pistons.
Thank you for the info.

What don't you people know? Anyone need programming help, its about all I know. ;)
 
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