PaulC

I have a 99 camaro, so if I installed a 4l80, I would need my OS changed. And to change the OS I would need HP Tuners? (~$450) Or have a tuning shop do it?

ShevrolayZ28

iTrader: (4)

That is correct. Or you could go with a manual valve body. Or use an aftermarket controller.

PaulC

Would it be at all possible to swap in a 99+ silverado pcm in my Camaro to get around tuning? I would have the 4L80 harness from the truck pcm with it.

slow67

iTrader: (2)

Possibly, but then you have to deal with VATS. Maybe one of the mail order tune companies can do it for you.

CarsandWomen

iTrader: (19)

I just read this whole thread, i figure theres a 10% chance i missed it but ive spent the better part of 2 hours here so....

seems Rossler makes RMVB and Tbrake kit that work at the same time on the 80, how would one control the lockup function of the converter?

what are the gear ratios of the 80 compared to 4l60, t56, th400 etc? personally im only interested in comparing to the 60 but im not the only member of ls1tech.

MY99TAWS6

iTrader: (3)

4l80e is 2.48,1.48 and 1.1 and .75
400 is same ratios no overdrive.
4l60 is 3.06 not sure on the rest.

slow67

iTrader: (2)

Rossler doesn't have a RVMB. He isn't the only one with a brake either (and his isn't exaclty the fastest engaging or releasing).....

OD in a 4L80 is like 5th gear on a T56. It is MUCH stronger than a 4L60E, and literally is a new electronic version of the Th400 (2/3 of the geartrain/clutches is shared with the Th400).

Put it this way, 4L80E can be built to go 7s in the 1/4 mile (Ohio boys have done it).

For lockup, either put it on a switch or buy a lockup controller (they make em for 700R4s and 2004Rs)

CarsandWomen

iTrader: (19)

so can you run RMVB and Tbrake in the same trans? there was some discussion earlier but i never saw a clear cut answer.

whats the max a STOCK 4l80 can handle? im asking cuz A ive got a 98, and B im blowing up built 4l60's like there fuggan iraqi tanks

slow67

iTrader: (2)

Yes. AFAIK, the only 2 people making an RVMB Tbrake are TCI and CK Performance.

For FMVB with Tbrake, there is Rossler (with his little converter box, extra) and Jake's Performance (I have this one, but full auto).

STONE STOCK 4L80E (as GM built it) will only hold ~500hp. With a rebuild (reputable 4L80E builder) or a Transgo -2 Kit, they will hold ~750 before you need to start adding billet parts (input is the first to go, then forward hub).

LT1Master

so i got a 95 camaro z28 with the 4l60e will that swap still work for me?

slow67

iTrader: (2)

You can go 3 ways:
RMVB, Tbrake 4L80E
FMVB, Tbrake 4L80E
Full Auto, Tbrake 4L80E (I like this one the best, but assumes you can tune your pcm)

jakeshoe

iTrader: (14)

TCI makes a RMVB brake for the 4L80E.
Rossler makes an add-on manifold for forward pattern only, and can be setup as auto or full manual. It requires a deep pan and is known to be too slow for a pro-tree.

CK Performance makes a forward and reverse pattern manual transbrake, and I believe he has one for auto shift as well.

I make one for forward pattern auto function and manual function. Same brake, different methods of controlling the trans. No deep pan required.

Stock 4L80E is good for about 450-500 HP. The stock hard parts are good for about 750 HP/TQ. The hydraulics need to be upgraded to live above 500 HP.

CarsandWomen

iTrader: (19)

as for the valvebody, RMVB or FMVB? ive got a 98 so it cannot be controlled by the PCM, thats the only reason im looking into that. the T-brake is a must, just cuz theyre killer lol.

as for the Transgo -2 Kit, this one?

slow67

iTrader: (2)

A transgo -2 kit is for full auto, -3 is for full manual (I don't think the hydraulic full manual kit works very well). I can make a '98 PCM control a 4L80E for full auto (with some tuning), thats no problem. PM me for those details.

biggie

I have a 2001 silverado I am fixing to do a 6.0swap with a 4l80e tranny.what kind of conversion kit do I need and where do I find it for a reasonable price. Thanks for the help.

CarsandWomen

iTrader: (19)

You guys running MVB's, what shifter do you have and how do you like it?

Ratical

iTrader: (82)

Great thread. I just bought a 2005 5.3 with harness and computer for a swap. Is there anything different about the 05 computer/harnesses than the older versions? It was an auto 4wd crew cab half ton Z71. I am guessing it would have the 4l60 correct? Since it's such a large truck, could it have a 4l80 in it or was that 2500 and up only trucks?

CarsandWomen

iTrader: (19)

going to start re-reading this thread, picked up a 4l80e yesterday, also got the TCI flexplate, BMR crossmember, and a TCI Pro Super rebuild kit. Now to choose a Transbrake

Earl Filter

iTrader: (1)

It will have a 4L65e.

Ratical

iTrader: (82)

Oh ok. Is everything else the same as far as the computer changes and harness changes needed? I know they changed the computer designs at some point through the years, just not sure what year it was.