Speartech LS2/6L80E swap! - PerformanceTrucks.net Forums



GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |
Sponsored by:
Sponsored by:

Speartech LS2/6L80E swap!

Reply
 
Thread Tools Search this Thread
Old 09-26-2007, 11:46 AM   #1
9 Second Club/LS1TECH Sponsor
Thread Starter
iTrader: (14)
 
Speartech's Avatar
 
Join Date: Nov 2001
Location: Anderson, Indiana
Posts: 1,661
Thanks: 0
Thanked 0 Times in 0 Posts
Default Speartech LS2/6L80E swap!

I decided we needed to get the new 6L80/6L90 series of transmission up and running in a swap project to get all of the electronics and programming worked out.

We are getting a lot of calls from people interested in this new transmission.

Here's what we did:

I wanted to start with something as easy as possible for the swap since the goal was to get it up and running quickly in order to work out any electronics/wiring/programming issues so that people will be able to successfully use this setup in their projects.

I found this 2001 4.8/4L60E 2WD Silverado close by so I snatched it up for the project. It just happened to be in my color of choice, and itís in pretty good shape with 135,000 miles on it.

Name:  01Truck_stockwheelshires.jpg
Views: 1575
Size:  56.3 KB
Name:  2001_stock_48engine01.jpg
Views: 1535
Size:  71.3 KB

The first step was to get the 4.8 engine and trans out.

Name:  48engineout.jpg
Views: 1555
Size:  176.3 KB

For the new engine/trans I used a new LS2 Corvette crate engine (Part #19156261)

Along with a new 6L80 transmission.

I decided to substitute the truck style harmonic balancer so that I could retain the original truck accessories and brackets. That way I wouldn't need any custom power steering hoses or A/C lines made.

We then installed the LS2/6L80 as one assembly.

Name:  6L80_LS2_01Truck_02.jpg
Views: 1548
Size:  79.0 KB
Name:  6L80_LS2_01Truck_07.jpg
Views: 1533
Size:  73.1 KB
Name:  6L80_LS2_01Truck_05.jpg
Views: 1529
Size:  64.4 KB

Because I retained the truck accessories I also had to take off the Vette LS2 intake manifold and substitute the LS2 truck intake manifold.

Name:  LS2_TBSS_intake01.jpg
Views: 1551
Size:  75.6 KB
Name:  Engine_in_PS_view.jpg
Views: 1526
Size:  73.9 KB


The 6L80/6L90 transmission uses the same style rear mount, but it sits back just a little further so we had to modify the stock rear trans crossmember a little for proper fit.

Name:  6L80_LS2_01Truck_06.jpg
Views: 1623
Size:  56.5 KB

The additional bulk of the 6L80 is mostly below the mainshaft centerline, so there is plenty of tunnel clearance for the transmission. That should be good for other vehicle swaps!
The overall length of the 6L80 transmission is actually SHORTER than the 4L60E! We had to use a longer driveshaft for this project. The 6L90 is 35mm longer than the 6L80 due to the thicker gears, etc.

Name:  Driveshaft_length02.jpg
Views: 1567
Size:  40.3 KB

With everything installed we built a custom wiring harness for the truck using the new E38 controller to run it with.

Name:  LS7_6L80_02v02.jpg
Views: 1540
Size:  64.5 KB

Since all of these new setups are electronic throttle, we had to fit the truck with the ETC pedal.

Name:  LS2_6L80_01Truck_ETCVettepedal01.jpg
Views: 1521
Size:  75.3 KB

After programming the E38 controller, the truck fired right up. Everything worked great so I took it for drive. Wow! What a first gear this thing has! The truck came stock with a 3.73 single pull rear end, and you can literally boil the rear tire all the way down the road while it shifts thru the gears!

On a truck this new we also made a mini-harness to retain the old computer so that all of the gauges and A/C would still function properly.

Name:  L92_6L80_plug_n_play_gage_miniharness01.jpg
Views: 1529
Size:  34.0 KB

With everything running so good I had to jaz up the truck a little bit.

Since the main goal was to sort out the wiring harness and programming, I stayed with the stock exhaust manifolds and Y pipe. I did add a Gibson sport cat-back exhaust system with stainless tips for a little help in the breathing department (sounds great).

Since this had been a work truck and the bed was all scratched up, I added a GM one piece bedliner and a set of Silverado SS chrome wheels with Goodyear F1 tires (P275/45-20) to upgrade the looks department.

I think the truck looks much better now!

Name:  01truck_driverside_SSwheels.jpg
Views: 1528
Size:  47.0 KB
Name:  01truck_passside_SSwheels.jpg
Views: 1523
Size:  49.5 KB
Name:  Gibsontips.jpg
Views: 1521
Size:  86.8 KB


I also had a positraction unit put in the rear for some traction capabilities.

After getting it dialed in a little bit I took it to the dragstrip for a few passes to see how it would do.

All passes were in the 13ís with a best of 13.67 at 101.
Name:  17_timeslip.jpg
Views: 1522
Size:  23.8 KB

I donít have a very good feel for truck quarter mile times but I did get a lot of compliments on the looks and performance, so 13.60ís must be pretty decent.

The truck feels really strong on the street, so considering everything (no headers, street tires, stock converter, etc.) I think the times are pretty good.

Thanks to the Speartech crew for the powertrain installation and custom wiring harness.

Thanks to RPM Transmissions for the positraction unit and installation.

Thanks to Speedcraft Prototypes for the custom length driveshaft.

We recently got a skid of brand new 6L90ís in the shop. Here's what the 2WD version looks like:
Name:  6L90trans03.jpg
Views: 1517
Size:  28.5 KB
Name:  6L90trans01.jpg
Views: 1523
Size:  66.1 KB
Name:  6L90trans02.jpg
Views: 1525
Size:  62.0 KB

Last edited by Speartech; 08-25-2011 at 07:22 PM.
Speartech is offline   Reply With Quote
Old 09-26-2007, 12:00 PM   #2
TECH Fanatic
iTrader: (2)
 
Join Date: Nov 2004
Location: ODESSA, TX
Posts: 1,051
Thanks: 0
Thanked 0 Times in 0 Posts
Default

How much would a kit like this be?
00Z71 is offline   Reply With Quote
Old 09-26-2007, 12:31 PM   #3
High on diesel fumes
iTrader: (70)
 
thunder550's Avatar
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 12,664
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I may not be understanding right.....are you running three controllers now? Original PCM for a/c and gauges, new PCM for the LS2 engine, and also a separate tranny controller? Is it possible to just run the original truck PCM and a separate tranny controller?
thunder550 is offline   Reply With Quote
Old 09-26-2007, 12:58 PM   #4
TECH Junkie
iTrader: (10)
 
Join Date: Feb 2007
Posts: 3,111
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by thunder550
I may not be understanding right.....are you running three controllers now? Original PCM for a/c and gauges, new PCM for the LS2 engine, and also a separate tranny controller? Is it possible to just run the original truck PCM and a separate tranny controller?


will there be a way to use the stock unit and the Tranny???
ZZebes is offline   Reply With Quote
Old 09-26-2007, 01:52 PM   #5
TECH Enthusiast
 
jaegmc99's Avatar
 
Join Date: Apr 2006
Location: Bako,CA
Posts: 668
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Oh I want so bad!!! Now!! Even if it does work, there probably won't be converters for a while
jaegmc99 is offline   Reply With Quote
Old 09-26-2007, 01:55 PM   #6
9 Second Club/LS1TECH Sponsor
Thread Starter
iTrader: (14)
 
Speartech's Avatar
 
Join Date: Nov 2001
Location: Anderson, Indiana
Posts: 1,661
Thanks: 0
Thanked 0 Times in 0 Posts
Default

00Z71- There's really not a kit price for something like this in a late model truck. More of a feasibility study on the whole thing, and the truck was just an easy platform to do it on.

thunder550- As it turns out, the original PCM is in there performing the mighty task of operating the water temp gauge and the fuel level gauge. There was no other easy way to get those two gauges to work. The A/C is basically a stand alone system not needing any of the 3 controllers.
Speartech is offline   Reply With Quote
Old 09-26-2007, 01:58 PM   #7
High on diesel fumes
iTrader: (70)
 
thunder550's Avatar
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 12,664
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Speartech
thunder550- As it turns out, the original PCM is in there performing the mighty task of operating the water temp gauge and the fuel level gauge. There was no other easy way to get those two gauges to work. The A/C is basically a stand alone system not needing any of the 3 controllers.
Is this necessary because of the CAN bus that the new tranny runs off of? I was hoping someone would make some kind of conversion module that would allow the older style PCM's like we have to communicate with the CAN controllers that the new trans needs.

What needed to be done to the LS2 PCM to work with the 6L80E instead of the 4 speed that the Vette's and GTO's come with?
thunder550 is offline   Reply With Quote
Old 09-26-2007, 01:59 PM   #8
TECH Senior Member
iTrader: (26)
 
kbracing96's Avatar
 
Join Date: Jul 2004
Location: Oakland, OR
Posts: 9,372
Thanked 9 Times in 8 Posts
Default

4wd???? Possible????
kbracing96 is offline   Reply With Quote
Old 09-26-2007, 02:16 PM   #9
9 Second Club/LS1TECH Sponsor
Thread Starter
iTrader: (14)
 
Speartech's Avatar
 
Join Date: Nov 2001
Location: Anderson, Indiana
Posts: 1,661
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by ZZebes


will there be a way to use the stock unit and the Tranny???

I don't see any way to do it.

John
Speartech is offline   Reply With Quote
Old 09-26-2007, 02:20 PM   #10
9 Second Club/LS1TECH Sponsor
Thread Starter
iTrader: (14)
 
Speartech's Avatar
 
Join Date: Nov 2001
Location: Anderson, Indiana
Posts: 1,661
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by thunder550
Is this necessary because of the CAN bus that the new tranny runs off of? I was hoping someone would make some kind of conversion module that would allow the older style PCM's like we have to communicate with the CAN controllers that the new trans needs.

What needed to be done to the LS2 PCM to work with the 6L80E instead of the 4 speed that the Vette's and GTO's come with?
Yes, it's the CAN bus that changes everything. The trans will only talk to the new 58X Gen 4 engines/controllers.

I don't see anyway to use it with a 24X engine.
Speartech is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
3.73s or 4.11s? 86 IROC TOWING & OFFROAD PERFORMANCE 7 03-13-2017 05:02 PM
Help with LQ4 swap in 91 Z71 RCSB GrooveCityZ71 GM Engine & Exhaust Performance 7 08-31-2015 12:05 PM
LS swapped 88. Need help identifying a noise. superchomper2003 GM Drivetrain & Suspension 3 08-26-2015 09:39 AM
08 4L60E to 4L80E 4X4 XL7 GM Drivetrain & Suspension 2 08-06-2015 07:12 AM
Transfercase input gear for that 80E swap you've always wanted. iregret GM Parts Classifieds 3 07-27-2015 10:32 PM


Tags
4l60e, 4l90, 53, 6l80, 6l80e, c10, engine, gen, harness, iv, l92, ls2, performance, problems, speartech, swap

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 03:53 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: