late model 4L80E vs early style differences
late model 4L80E vs early style differences What parts CANNOT be used in the late style 4L80e (unit with the rear located cooler line)....from the earlier style?
Basically I am in the process of switching internals to a later model case and want to know if there are any parts that are specific to the later model units?
Please be detailed and give part numbers if possible.
I know the rear cooler line fitting has an extension on it.....
Thanks
Basically I am in the process of switching internals to a later model case and want to know if there are any parts that are specific to the later model units?
Please be detailed and give part numbers if possible.
I know the rear cooler line fitting has an extension on it.....
Thanks
I hate to be one to say this but you are doing something that I really do not recommend. It would be cheaper to start with the proper core. The differences in the units are in the lube circuit. With the change in the lube circuit many parts have changed and are not interchangeable. Here is a quick list for you. Output shaft, valve body, separator plate, pump, center support, sun gear shaft, sun gear, main shaft, ring gear, and probably a few more that I can not think of right now. I do not recommend doing this swap. Vince
thanks Vince....
I have the core for both styles.....the only reason I wanted to use the early style parts in the late case was the fact that I know they worked fine..
I know the output shaft is different(no oil hole for feed to case bushing) ....and the intermediate shaft (solid )......but a side by side comparison of the other parts you listed look identical...even casting numbers on the front of the pump are the same.
Do you think I should just use the parts from the late model unit...and make sure they are in good shape?
I actually have a custom output shaft for the C5 corvette rear differential..
Thanks
I have the core for both styles.....the only reason I wanted to use the early style parts in the late case was the fact that I know they worked fine..
I know the output shaft is different(no oil hole for feed to case bushing) ....and the intermediate shaft (solid )......but a side by side comparison of the other parts you listed look identical...even casting numbers on the front of the pump are the same.
Do you think I should just use the parts from the late model unit...and make sure they are in good shape?
I actually have a custom output shaft for the C5 corvette rear differential..
Thanks
I would use the parts for a later unit in the later case. I have seen guy's mismatch parts and melt down a unit very quickly. I understand that some of the parts might appear to be the same. Look closely at to how the oil has to flow through these parts and you will see the differences. Different style lube holes, deeper cut slots, different bushing designs, different length polished surface where bushing will ride and so on. It is very easy to make a mistake and the end result is scrap metal. Vince
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On The Tree
Joined: Jun 2007
Posts: 128
Likes: 0
I know about the top hole , I have been told i don't have to use it if it's not there.
I am interested more in the internal differences.
Is there any benefits in performance and/or long term reliability , to getting an earlier model box built?
It's funny, some shops prefer early autos and some prefer late, why?
cheers
I would like to know too
Thanks for the info Vince.
I know about the top hole , I have been told i don't have to use it if it's not there.
I am interested more in the internal differences.
Is there any benefits in performance and/or long term reliability , to getting an earlier model box built?
It's funny, some shops prefer early autos and some prefer late, why?
cheers
I know about the top hole , I have been told i don't have to use it if it's not there.
I am interested more in the internal differences.
Is there any benefits in performance and/or long term reliability , to getting an earlier model box built?
It's funny, some shops prefer early autos and some prefer late, why?
cheers
Different planetaries, different sun gear, different intermediate shaft, center support, torrington bearings, sun gear shaft, overdrive sprag and carrier, etc.
It's best not to play with mixing these parts. They look very similar and unless you really know what you are doing you get to do it over and over until you figure it out.
Buy a good core, rebuild it, and go.
The earlier cores work fine, the difference is the lube flow and some slight strenght improvements. The early models are a way better design strenght wise than the best 4L60 derivative, so use what you can find.
Vince is right, for an LS1, use the '99 up preferably.
It's best not to play with mixing these parts. They look very similar and unless you really know what you are doing you get to do it over and over until you figure it out.
Buy a good core, rebuild it, and go.
The earlier cores work fine, the difference is the lube flow and some slight strenght improvements. The early models are a way better design strenght wise than the best 4L60 derivative, so use what you can find.
Vince is right, for an LS1, use the '99 up preferably.
Early or late to me really doesn't matter. I have both of which in 1000+rwhp cars and trucks. The early units had pistons that were prone to breakage. With the updated steel molded pistons this can be corrected. Also the early solenoids had issues and were updated a couple times to what we currently see in these units as new. To me I like to get as many bolts as possible installed into the block. With the LS1 engines and an early 80 case we loose this. Just a thought. Also with a late 80 you can install a structural inspection cover that you can bolt to not only the trans but also the engine oil pan. More strength!
I am running into a issue, I am running a 94-95 4L80E I believe and I can't get the 02 411 ECU to work with the trans. Just stays in 2nd gear limp mode, could this be because of some of the internal electrical parts being an older model not work with a 02 ECU?
I have hp tuners with a 4L80E segment swap, pink wire shows 10.8 volts (new harness built by EFI connections), trans worked find when I had the TCI box hooked up to it.
Any other ideas?
I have hp tuners with a 4L80E segment swap, pink wire shows 10.8 volts (new harness built by EFI connections), trans worked find when I had the TCI box hooked up to it.
Any other ideas?
Teching In
Joined: Dec 2003
Posts: 48
Likes: 0
From: San Diego
Don't mean to hijack the thread, but reading between the lines, it sounds like an early 90s 4L80E is interchangeable with a late 90s/early 00s. Is that correct?
I'm looking to pick up an 80E for my '01 5.3L vortec and was wondering if I have to get specific year ranges.
Cheers
I'm looking to pick up an 80E for my '01 5.3L vortec and was wondering if I have to get specific year ranges.
Cheers
Last edited by Classic Style; Jan 11, 2012 at 01:51 AM.
