6L80E Swap
6L80E Swap Classic Restoration Enterprises is continuing work on their 1986 Pontiac Grand Prix 2+2 Cadillac 6.2L VVT/6L80 swap. They have the engine and transmission in the car. By the way, it's also running a C5 ZO6 corvette suspension. They are using 2003 Corvette Z06 wheels with oversized 315/30ZR18 tires for the rear. Just barely stick out.
This may be one of the first "working" 6L80E swaps so far.
Swap pics:
http://www.classicresto.com/mambo/content/view/96/48/
This may be one of the first "working" 6L80E swaps so far.
Swap pics:
http://www.classicresto.com/mambo/content/view/96/48/
TECH Enthusiast
Joined: Mar 2005
Posts: 566
Likes: 0
From: Dallas
Are they just using a Denali or Escalade control modules?
If they are not, then someone's done some tinkering.
If they are just using the modules from the SUV, then cool swap, but nothing standout for progress.
If they are not, then someone's done some tinkering.
If they are just using the modules from the SUV, then cool swap, but nothing standout for progress.
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
We've had our LS2/6L80 swap on the road for about 2 months and are now selling the harness/ECM/trans systems. Just need to get the web site updated.
We just shipped an L92/6L80 rework package out, as well as an LS7/6L90 setup out to California.
There seems to be a lot of interest in these!
We just shipped an L92/6L80 rework package out, as well as an LS7/6L90 setup out to California.
There seems to be a lot of interest in these!
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
The electronics to make this work are heavily integrated between the transmission and the ECM. To make it work on a Gen 3 engine you would have to change the reluctor wheel over to the 58X version and go with the newer E38 ECM. Not real practical for an existing setup, but if you're starting a new project it's definitely worth giving some thought to!
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
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TECH Apprentice
Joined: Jun 2007
Posts: 364
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What are the benefits other than bragging rights in a vehicle that is not towing 10k + lbs? I suppose you could run 4.56's or higher with a double over drive.
What are the gear ratios of the 6l80?
How much biggger is than the 4l80e?
John
What are the gear ratios of the 6l80?
How much biggger is than the 4l80e?
John
Teching In
Joined: Mar 2004
Posts: 31
Likes: 0
Originally Posted by ponjohn
What are the benefits other than bragging rights in a vehicle that is not towing 10k + lbs? I suppose you could run 4.56's or higher with a double over drive.
What are the gear ratios of the 6l80?
How much biggger is than the 4l80e?
John
What are the gear ratios of the 6l80?
How much biggger is than the 4l80e?
John
How strong are these transmission stock and are shops building them yet? Will it require a new crossmember?
6L80E ratio's
First: 4.02
Second: 2.36
Third: 1.53
Fourth: 1.15
Fifth: 0.85
Sixth 0.67
Reverse: 3.06
Only difference I could find in the 80 and 90, as far as ratio's, is the first gear looks to be 4.03 on the 90. You would never notice that small amount.
First: 4.02
Second: 2.36
Third: 1.53
Fourth: 1.15
Fifth: 0.85
Sixth 0.67
Reverse: 3.06
Only difference I could find in the 80 and 90, as far as ratio's, is the first gear looks to be 4.03 on the 90. You would never notice that small amount.
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
The ratios are the same between the 80 and the 90. The 90 gets beefier parts and thicker gears making it 35mm longer. The 6L80 is actually a little shorter than the 4L60E. We had to actually LENGTHEN the driveshaft for our project.
I think the big advantage with the 4.03 first gear is to use a lower numerically rear end ratio without giving up any off the line performance and still be able to cruise at a very low rpm down the highway.
I have our LS2/6L80 setup mated to a 3.73 rear end and the thing is an incredible beast off the line (as would be expected).
You could change the rear end to a 2.73 and still have almost the same first gear multiplication as 3.73's with a 4L60E. Think of how low your highway cruising rpm would be with 2.73 gears and a .67 overdrive! That's what I feel the big advantage would be (although the 6L80 with 3.73's is a lot of fun).
I think the big advantage with the 4.03 first gear is to use a lower numerically rear end ratio without giving up any off the line performance and still be able to cruise at a very low rpm down the highway.
I have our LS2/6L80 setup mated to a 3.73 rear end and the thing is an incredible beast off the line (as would be expected).
You could change the rear end to a 2.73 and still have almost the same first gear multiplication as 3.73's with a 4L60E. Think of how low your highway cruising rpm would be with 2.73 gears and a .67 overdrive! That's what I feel the big advantage would be (although the 6L80 with 3.73's is a lot of fun).
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
These are from gmpowertrain.com
6L90E:
Maximum engine torque: 531 lb-ft
Maximum gearbox torque: 885 lb-ft
6L80E:
Maximum engine torque: 439 lb-ft
Maximum gearbox torque: 664 lb-ft
6L90E:
Maximum engine torque: 531 lb-ft
Maximum gearbox torque: 885 lb-ft
6L80E:
Maximum engine torque: 439 lb-ft
Maximum gearbox torque: 664 lb-ft
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
Originally Posted by john 67
speartech; does this mean there is an ls2/4l80e package as well? ive been waiting patiently thanks JOHN
Yes! LS2/LS7 with 4L80E is now available. Let me know your details and we'll get you fixed up.
Thanks.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
TECH Apprentice
Joined: Jun 2007
Posts: 364
Likes: 0
It all sounds good on paper, in order to use it you'll have to have a well thought out combo. It could end up where the engine does not have enough tque to pull a 3.23 gear and OD unless your doing 180mph.
John
John
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
Originally Posted by adams2003
What car/truck is the 6L90 used in?
All of the Escalades and Denalis use the 6L80 with the 6.2.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
Launching!
Joined: Apr 2007
Posts: 276
Likes: 0
From: Utah
I have a truck with big tires and the 4L80e the first gear would be awesome and really help me as my current first is close to the new 2nd but the difference between .67 and .70 (4L60E) and my .75 (4L80) can't make that big a difference I am thinking. otherwise my friend who drives a Denali should be getting better than 12.2 mpg cause the engine itself is incredible and has gobs of low end TQ.
running some rpm calculations if my truck had 30 inch tires and it was geared at 4.56 running at 70mph the I would be running at 2861 RPMs (.75 final ratio)
with the same parameters but using the 6L80e (.67 final ratio) it is 2395 RPMs
with the same parameters but using the 4l60e (.70) the RPMs is 2502.
I guess with my own evedence the difference between the 6L80 and 4L80 is real enough but the 100 rpm difference from the 4l60 i am not sure about.
I guess I should get back to work
I also have to chime in on the ugly car thing
running some rpm calculations if my truck had 30 inch tires and it was geared at 4.56 running at 70mph the I would be running at 2861 RPMs (.75 final ratio)
with the same parameters but using the 6L80e (.67 final ratio) it is 2395 RPMs
with the same parameters but using the 4l60e (.70) the RPMs is 2502.
I guess with my own evedence the difference between the 6L80 and 4L80 is real enough but the 100 rpm difference from the 4l60 i am not sure about.
I guess I should get back to work
I also have to chime in on the ugly car thing