yet another LS swap......newb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72RK · 07-13-2009, 04:20 PM

Sorry after a two year restoration this is the first time i have posted... normally i just read what you kind folks have to say and keep my mouth/hands shut...

this board has truly been a blessing for those of us who can't get enough of these trucks....

Yet another slew of questions for you guys that have decided to go with a Gen III drivetrain for our trucks..

1) How to adapt the original tranny cooling lines to the 4l80E? My truck originally had the TH-350.

2)What is the best way to set up the fuel injection from CPP fuel tank.. only one outlet and return currently, i have talked Tanks Inc about their intank fuel pump....

tucnnuts · 07-13-2009, 05:50 PM

i would think on the trans lines you could adapt them using compression fittings maybe, or go with a newer style rad. ...maybe just reflare the newer line set to the inverted flare fittings..maybe just my two cents..

PanelDeland · 07-13-2009, 07:00 PM

NAPA usually has a good selection of tubing adapters for mating one style/size fitting to another,should solve your plumbing of the tranny issues.2.Run an auxilary tranny cooler(probably have to extend the lines for that).I don't like using "compression fittings" on the pressure from a tranny.
I would look into an electric pump(probably frame mounted) and run a fuel regulator since you already have the tank.

72RK · 07-13-2009, 09:07 PM

Thanks for the info, i will take the fittings out of the 4L80E and ease on down to NAPA and see what i can come up with....

boostat4500 · 07-13-2009, 09:06 PM

My advise is to run a separate, large as possible, tranny cooler, if you aren't all ready, I'm not sure what these trucks came with for autos. These 4L80E's don't like heat.
Will that tank let you run an internal pump? If not just get an in-line pump. Either style, run an aftermarket reg. with it and your golden.

72RK · 07-13-2009, 09:12 PM

Quote:

Originally Posted by boostat4500

My advise is to run a separate, large as possible, tranny cooler, if you aren't all ready, I'm not sure what these trucks came with for autos. These 4L80E's don't like heat.
Will that tank let you run an internal pump? If not just get an in-line pump. Either style, run an aftermarket reg. with it and your golden.

I suppose i can run an aftermarket tranny cooler, i thought the one in the radiator would be sufficient. Its an aftermarket from Cheyenne man in Texas..

I planned on running an in tank fuel pump so i have the tank dropped right now... should be easy enough to make a hole and insert the Tanks.Inc pump...

Any of you guys looked at the Fuel kit available through Russell Performance...

has the Corvette regulator/filter and inline pump and quite a few feet of hose with the AN fittings.... They are kinda proud of that stuff....

OldCreek · 07-14-2009, 11:58 PM

Haven't done this yet...

but I think the compression adapter can be removed from the 4L80 case. I believe the threads are 1/4" NPT. If so, buy a 1/4" NPT sized fitting and run any type of line you want. I believe I will run a 1/4" NPT to -6AN fitting and then run a line to the cooler. (it might be a 5/16" NPT)

Also, look here for a compression fitting to -6AN that will go into the original 4L80 fitting: http://www.purechoicemotorsports.com...cat/cat135.htm

72RK · 07-15-2009, 07:14 AM

I went to my local NAPA just yesterday and figured out that the fittings are pipe thread into the 4l80 trans case. i was surprised, figured it would have been metric...so i have some pipe-inverted flare adapters coming in today.

thanks

Shon · 07-15-2009, 08:04 AM

I normally get a barb'd fitting and screw into the trans and run new trans lines from there, it's alot easier.
BUT for my swap, I am going to start off using the stock lines up to a point, then they are cut and flared and I will clamp lines to that.

boostat4500 · 07-15-2009, 07:04 PM

A word of caution on using the barbed adapters. I did that on mine and it was no good. I recently had the tranny rebuilt and they said they could tell there was a lack of fluid flow because of the non OEM fittings. Caused premature wear on the internals. Could be BS, but this shop has a great reputation in town for building high horse trannys, so I doubt it. Plus they had nothing to gain by telling me this. Just a heads up.

07-13-2009, 04:20 PM	#1
72RK Registered User Join Date: Jan 2007 Location: arkansas Posts: 7	yet another LS swap......newb Sorry after a two year restoration this is the first time i have posted... normally i just read what you kind folks have to say and keep my mouth/hands shut... this board has truly been a blessing for those of us who can't get enough of these trucks.... Yet another slew of questions for you guys that have decided to go with a Gen III drivetrain for our trucks.. 1) How to adapt the original tranny cooling lines to the 4l80E? My truck originally had the TH-350. 2)What is the best way to set up the fuel injection from CPP fuel tank.. only one outlet and return currently, i have talked Tanks Inc about their intank fuel pump....

07-13-2009, 05:50 PM	#2
tucnnuts if they can make it so can I! Join Date: Feb 2008 Location: birmingham, alabama Posts: 97	Re: yet another LS swap......newb i would think on the trans lines you could adapt them using compression fittings maybe, or go with a newer style rad. ...maybe just reflare the newer line set to the inverted flare fittings..maybe just my two cents..

07-13-2009, 07:00 PM	#3
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: yet another LS swap......newb NAPA usually has a good selection of tubing adapters for mating one style/size fitting to another,should solve your plumbing of the tranny issues.2.Run an auxilary tranny cooler(probably have to extend the lines for that).I don't like using "compression fittings" on the pressure from a tranny. I would look into an electric pump(probably frame mounted) and run a fuel regulator since you already have the tank. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" Last edited by PanelDeland; 07-13-2009 at 07:04 PM.

07-13-2009, 09:07 PM	#4
72RK Registered User Join Date: Jan 2007 Location: arkansas Posts: 7	Re: yet another LS swap......newb Thanks for the info, i will take the fittings out of the 4L80E and ease on down to NAPA and see what i can come up with....

07-13-2009, 09:06 PM	#5
boostat4500 Registered User Join Date: Aug 2006 Location: Reno, NV Posts: 346	Re: yet another LS swap......newb My advise is to run a separate, large as possible, tranny cooler, if you aren't all ready, I'm not sure what these trucks came with for autos. These 4L80E's don't like heat. Will that tank let you run an internal pump? If not just get an in-line pump. Either style, run an aftermarket reg. with it and your golden. __________________ 1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc.

07-14-2009, 11:58 PM	#7
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: yet another LS swap......newb Haven't done this yet... but I think the compression adapter can be removed from the 4L80 case. I believe the threads are 1/4" NPT. If so, buy a 1/4" NPT sized fitting and run any type of line you want. I believe I will run a 1/4" NPT to -6AN fitting and then run a line to the cooler. (it might be a 5/16" NPT) Also, look here for a compression fitting to -6AN that will go into the original 4L80 fitting: http://www.purechoicemotorsports.com...cat/cat135.htm __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

07-15-2009, 07:14 AM	#8
72RK Registered User Join Date: Jan 2007 Location: arkansas Posts: 7	Re: yet another LS swap......newb I went to my local NAPA just yesterday and figured out that the fittings are pipe thread into the 4l80 trans case. i was surprised, figured it would have been metric...so i have some pipe-inverted flare adapters coming in today. thanks

07-15-2009, 08:04 AM	#9
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: yet another LS swap......newb I normally get a barb'd fitting and screw into the trans and run new trans lines from there, it's alot easier. BUT for my swap, I am going to start off using the stock lines up to a point, then they are cut and flared and I will clamp lines to that. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

07-15-2009, 07:04 PM	#10
boostat4500 Registered User Join Date: Aug 2006 Location: Reno, NV Posts: 346	Re: yet another LS swap......newb A word of caution on using the barbed adapters. I did that on mine and it was no good. I recently had the tranny rebuilt and they said they could tell there was a lack of fluid flow because of the non OEM fittings. Caused premature wear on the internals. Could be BS, but this shop has a great reputation in town for building high horse trannys, so I doubt it. Plus they had nothing to gain by telling me this. Just a heads up. __________________ 1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc.



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