Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

My T56 to 4L80E Build

Thread Tools
 
Search this Thread
 
Old Nov 5, 2016 | 10:16 PM
  #121  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

In an F-car you have to install the dipstick tube before you raise the trans to the engine.
Reply
Old Nov 5, 2016 | 10:18 PM
  #122  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

Also, removing the y-pipe and catalysts gives you more elbow room in general.
Reply
Old Nov 5, 2016 | 10:22 PM
  #123  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

The 4L80E extension housing has no provision for the torque arm mount (and cat/y-pipe hanger)...

and the 4L60E extension housing does not fit the 4L80E case...

so you will need a remote TA mount/cross-member (e.g. see UMI or BMR).

Last edited by joecar; Nov 5, 2016 at 10:39 PM.
Reply
Old Nov 5, 2016 | 10:26 PM
  #124  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

You maybe should lightly apply wheel bearing grease to the splines inside the driveshaft yoke before inserting it into trans.

Doesn't 4L80E require a different yoke...?

Last edited by joecar; Nov 5, 2016 at 10:37 PM.
Reply
Old Nov 5, 2016 | 10:34 PM
  #125  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

Before starting you could probably put 8-10 qaurts...

you should check cooler circuit flow and flush the cooler (even if it is new) by removing the return line from the cooler, and route cooler output to a bucket, and start engine, you should get about 2 quarts in 30 seconds (and now stop engine)... if this is ok then reconnect cooler return line and continue... this would be done on the first engine start.

With cooler, trans and converter probably takes 12-14 quarts.

Last edited by joecar; Sep 12, 2018 at 03:33 PM.
Reply
Old Nov 5, 2016 | 10:36 PM
  #126  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

Also, connect a length a hose to trans air vent (on case top) and route it to torque arm (TA should have a clip for it).

Last edited by joecar; Nov 5, 2016 at 10:41 PM.
Reply
Old Nov 5, 2016 | 10:47 PM
  #127  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

What are you doing about PCM trans segment for controlling the 4L80E...?

You need the trans segment and trans diag segment from a tune file that has OS id matching your OS... you should actually swap to an AT file, preferably having OS id 12212156 as there are various 12212156 4L80E truck files that you can copy trans segments from...

( since you mentioned "torque arm" somewhere above, I'm assuming you have a 4.2 gen F-car with a 0411 PCM )

Last edited by joecar; Sep 12, 2018 at 03:33 PM.
Reply
Old Nov 6, 2016 | 08:30 AM
  #128  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Ty ty ty! I'll add those to my steps. You're right on the torque arm. I'll be reattaching that to the cross member I picked up. I'll reword that. Good call on the dipstick part too. In my head I was planning on routing it while the trans is out and then just installing it to the trance once its slid into place but I didn't get that worded in right.

A segment swap I should be good without. I'll be using an aftermarket controller. Compushift II. It has its own harness so once I get all of the steps for installing it sorted out I'll be incorporating them into my list accordingly.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Nov 6, 2016 | 07:40 PM
  #129  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

ok, good deal, let us know how it all goes.
Reply
Old Nov 7, 2016 | 06:51 PM
  #130  
No Lie's Avatar
Registered User
 
Joined: Nov 2016
Posts: 2
Likes: 0
Default

Hi Are You interested In trading my auto ls1 harnesd for your t56 Harness


Originally Posted by joecar
The PN switch tells the PCM if the lever is in P/N or not (so it can select the PN or IG idle tables).

The pressure switches on the bottom of the VB tell the PCM which gear range is selected (P/N, R, D4, D3, manual 2, manual 1), so it knows how many and what gears to sequence thru.

The PCM uses the VSS and TPS sensors to lookup the shift tables to see what the current gear should be (and to shift into it).
Reply
Old Feb 21, 2017 | 03:16 PM
  #131  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Sorry for being so dormant on this. So much going on outside of this project. I made some great progress the last couple weekends and today in particular. Got the T56 out. I had to take the tranny off of the bellhousing first and then remove the bellhousing after the tranny was out of the way. Kudo's to all of you who can get that out without separating the bellhousing but no amount of curse words was helping me in doing so. Now to get the turbo stuff off while things are out of the way.
Reply
Old Feb 21, 2017 | 04:05 PM
  #132  
82cetuner's Avatar
10 Second Club
iTrader: (9)
 
Joined: Sep 2009
Posts: 1,368
Likes: 7
From: Denham Springs, LA
Default

good read in starting my 4l80e swap soon as I am done rebuilding the trans to jake stage 3 spec. still sourcing parts now. still unsure on what flywhee an tq converter combo to go with for my setup
Reply
Old Feb 26, 2017 | 05:12 PM
  #133  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Nice car in your sig, looks very close to mine except you've got nicer wheels

Made more progress this weekend. Got the clutch and flywheel off. Also started taking off some of the APS turbo setup. I've got the downpipes and wastegate assemblies off of the hot side of the turbos. Looking at it now, I feel that I should have removed the turbo stuff prior to the removal of the transmission as it looks like in order to get the exhaust manifolds and turbos themselves off I will have to drop my kmember. Since the kmember and a jack w/ a piece of wood are the only thing supporting the engine right now, I'm thinking there is no way for me to get the turbo stuff off untill i reinstall the new tranny setup so that it will be supported by the tranny crossmember and the jack/wood so that removing the kmember will not make things too unstable/dangerous. Let me know if you guys know of a way that I can drop the kmember safely while the transmission is off. I'm guessing there is no real good way to do that so if i dont hear anything on that aspect I'll be working towards installing the trans as my next steps.

I modified the first post in this thread to contain my list of steps to remove the T56 and install the 4l80e. I added in a missing step that I'm at currently, obviously it would be good to install the flexplate before getting the tranny set to raise into place lol. Looks like those have to be torqued down to 61 ft-lbs. I'll have to double check on the bolts. I know when I bought my mezier flex plate I also got a set of ARP bolts. I wasnt sure if those were supposed to be bolts that hold the flexplate to the crank, or the flexplate to the converter. If you guys know those bolt specs please let me know so i can throw them in the steps.
Reply
Old Mar 5, 2017 | 04:07 PM
  #134  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Just got my Mezier flexplate mounted with the ARP bolts that was supplied when I bought the plate. Per my Haynes manual, they recommended the flexplate bolts be tightened to 61ftlbs which i've done. First time using a torque wrench but its a click drive and it clicked when it got to the dialed in torque. Its pretty fool proof on dialing in but 61ftlbs feels lighter than I thought it would have required. The torque wrench is pretty long though so i'm sure i had more leverage than I'm used to and that probably skewed my thoughts on how tight it actually is.

I just emailed jake (the builder for my tranny) what he recommends for ATF as it looks like the next steps will require it. What do you guys recommend for a high hp build? (stage 5 4l80e from Jake).
Reply
Old Mar 5, 2017 | 06:17 PM
  #135  
wht/73's Avatar
TECH Enthusiast
5 Year Member
 
Joined: Sep 2016
Posts: 518
Likes: 0
From: North Jersey
Default

I "think" it's dex 3 or 6.
I would go with whatever HE tells you tho.
I used 6.
Also, drop pan and check dipstick for correct level.
I used an aftermaket on and scribed a new line above pan rail.
Reply
Old Mar 5, 2017 | 09:25 PM
  #136  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Looks like Dex3 it is. He said it should be documented in the papers that came with the trans. I'll admit I forgot those were still bundled w/ the tranny. Its still wrapped in plastic w/ the documentation in the bellhousing. I'll have to break those out soon and modify my steps accordingly.

As far as dropping the pan and scribing a line above the pan rail. Is there a good pic of this? I'm thinking its something that'll be pretty obvious once im at that point but "seeing" it ahead of time is always welcome. I'll be using a stock 4l80e dipstick. I'm having troubles remembering what its originally built for but hopefully it'll fit with minimal fuss.

Its a few steps ahead of where i'm at now but one thing that I was kind of wondering when I was installing the flexplate today, how do you install the bolts that mate the flexplate to the torque converter? From what I was seeing, there was a lot in the way on that side of the flexplate and not a whole lot of room for a ratchet
Reply
Old Mar 5, 2017 | 09:37 PM
  #137  
wht/73's Avatar
TECH Enthusiast
5 Year Member
 
Joined: Sep 2016
Posts: 518
Likes: 0
From: North Jersey
Default

Originally Posted by dementia
Looks like Dex3 it is. He said it should be documented in the papers that came with the trans. I'll admit I forgot those were still bundled w/ the tranny. Its still wrapped in plastic w/ the documentation in the bellhousing. I'll have to break those out soon and modify my steps accordingly.

As far as dropping the pan and scribing a line above the pan rail. Is there a good pic of this? I'm thinking its something that'll be pretty obvious once im at that point but "seeing" it ahead of time is always welcome. I'll be using a stock 4l80e dipstick. I'm having troubles remembering what its originally built for but hopefully it'll fit with minimal fuss.
I'm sure Jake has that in his instructions too. He "may" have done it for you already if he sold you the dipstick/tube and I think he dyno's the trans's so I would "think" it's done.
Like I said, mine was an Allstar dipstick and tube so I didn't want to take the chance of running low so I dropped the pan which was easy as I have a lift in my garage and was a 1/4" higher then the mark on the stick.
You have a stock one tho so it's probably a lot closer.
Better safe then sorry.
My Nova has a stink bug stance so I go as far as leveling my car by driving the front wheels up onto 2"x4"'s to check the level.
I have the compushift 1 and it works great.
I even called Mike to do a safe tune for break in.
Then a month later he taught me how to fine tune the shift points!
20+min phone call.
Talk about customer support!
Especially on a 13yr old used TCM.
Reply
Old Mar 5, 2017 | 10:02 PM
  #138  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

Thats awesome to hear I'll be setting mine up with a Compushift 2 (which I already have). I've read the documentation for that and it seems like its pretty easy to work with. Hopefully thats the case.

I'll breakout the documentation from Jake tomorrow after work and give it a read. If the documentation doesnt specify a brand of ATF for dexron 3 what do you guys recommend? Thanks for the tips about the dip stick.

I think my next steps which I dont have documented in my swap steps are to fab up the t56 shift hole cover and get an idea on how to mount my shifter to it.

Last edited by dementia; Mar 5, 2017 at 10:12 PM.
Reply
Old Mar 10, 2017 | 12:34 PM
  #139  
82cetuner's Avatar
10 Second Club
iTrader: (9)
 
Joined: Sep 2009
Posts: 1,368
Likes: 7
From: Denham Springs, LA
Default

I decided to go ahead and do the d3 transbrake also. waiting for everything to come in to start. the wiring looks really easy and so does the install. btw I found a great solution for trans cooler line fittings for clearence. there pricey and im sure you could source it alot cheeper. but this should make things alot easier



I am a stickler for making things clean and easy. I pulled my motor so i can do all wiring and put it all together outside of the car. I plan to document as much as I can for others to follow
Reply
Old Mar 10, 2017 | 05:10 PM
  #140  
dementia's Avatar
Thread Starter
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 878
Likes: 0
Default

I have the same fittings packed away in the garage (moved in a few months ago so a lot of stuffs still boxed up). I was actually wondering how much tubing I'll need for the tranny cooler.
Reply



All times are GMT -5. The time now is 08:49 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE