4L80E build check

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May 18, 2022 | 11:02 PM

#21

Luis Corcuera

Teching In

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Quote:

Originally Posted by truckdoug

wow I havent seen a plate fail like that. make sure your case isnt jacked. maybe also put a .106 snap ring in there (might have to deck it a bit, depends on the case)

also might consider a "case saver" I think Jake has one that allows you to keep the 2-1 engine braking band.

The case looks good. Turns out the rollerized forward hub was machined just a bit over limits. I also see evidence of the direct making contact with the intermediate spring retainer and some slight contact marks on the forward hub from the direct having to much play. I didnt have the th400 retainer. And now I can see that the flimsy 4l80e one was starting to flare out. I'll be fixing the forward hub and use a spiral loc with a case saver this time around with the Th400 retainer. I'm almost considering not running the 2-1 band 🤔 thanks for the input

May 18, 2022 | 11:29 PM

#22

truckdoug

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From: Portlandia

now that I see quite a bit. IME, thrust end play specs and clutch pack clearances is what separates the wheat from the chaff.

May 19, 2022 | 08:30 AM

#23

MaroonMonsterLS1

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Joined: Dec 2012

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From: Iowa

Quote:

Originally Posted by truckdoug

now that I see quite a bit. IME, thrust end play specs and clutch pack clearances is what separates the wheat from the chaff.

thrust endplay and clutch pack clearance separates the wheat from the cow **** in the field

that's standard, most basic, mandatory stuff for any quality build

wheat from chaff comes in the form of additional modification of the thrust paths, geartrain stabilization, and most importantly, hydraulic circuit integrity and especially in a 4l80e...extensive modification.
The 80e pump is ****. pressure regulation is ****, lockup circuit is ****. intermediate and OD circuits need work. the lube circuit is a mess. etc