4l80e Transmission Cooling - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jbalgiere · 10-04-2018, 12:44 PM

I'm currently doing a lq9/4l80e swap and I'm plumbing the transmission lines. The plan was to use the factory transmission cooler in the radiator and then to a small auxiliary cooler then back to the trans. But while i was looking at how i was going to route my lines i realized the ports on the radiator are for 5/16 line but the 4l80e uses 3/8, so I'm wanting to know if running the lines to the radiator would create a restriction and i should just run the lines to a large transmission cooler and plug off the radiator. Any advice is appreciated!

Thanks!!

**The Rocknrod** · 10-04-2018, 03:13 PM

I have a US Radiator with a heat exchanger for the ATF. I plan to use a 200R4 with 3/8" lines (calls for 5/16") I bought the adapters for the radiator out/in to 3/8" tube inverted flare fittings I plan to use. As you can see not much restriction at all.

**The Rocknrod** · 10-04-2018, 03:20 PM

Also for the Trans side you use two of these, which are NPTS instead of NPT wich is incorrect:
http://www.fitzall.com/31284G.php

**The Rocknrod** · 10-04-2018, 03:22 PM

And I believe these are for the Radiator side:
http://store.fedhillusa.com/ad6br.aspx

**The Rocknrod** · 10-04-2018, 03:24 PM

These will make things a bit easier to fabricate:
http://store.fedhillusa.com/cnf6.aspx
Then all you need is tools and a bracket for the lines running next to the oil pan and that's easy enough.

**The Rocknrod** · 10-04-2018, 03:34 PM

Or just get a messy and do this:
https://www.ebay.com/itm/Automatic-T...!US!-1&vxp=mtr

Andy4639 · 10-04-2018, 03:49 PM

I have the 6.0/4L80E in my 71. I used the cooler and ran aux cooler. My transmission has never gone over 200 with normal driving. It has with a trailer behind it but not for very long and it was just a steep grade. it Normally runs along with my water temp.
I hooked the temp up to the scangauge 2, I keep a eye on the temps through the computer.
Doesn't hurt a thing.

Jbalgiere · 10-04-2018, 05:59 PM

Thanks guys for the help! So if I’m going to go through the radiator then to a cooler, what size auxiliary cooler do you guys think I need?

Andy4639 · 10-05-2018, 03:43 PM

I went to O Reillys and bought the biggest one they had on hand. It has more than been enough! I also put one in my 64 SS Impala also.

**The Rocknrod** · 10-05-2018, 04:58 PM

The 'Best' coolers are 'plate & Fin' coolers and they are stronger. The Tube & Fin coolers are not 'as' efficient and weaker. They cost more, you get more. It's your trany.

**truckdude239** · 10-08-2018, 05:34 PM

Quote:

Originally Posted by Andy4639

I have the 6.0/4L80E in my 71. I used the cooler and ran aux cooler. My transmission has never gone over 200 with normal driving. It has with a trailer behind it but not for very long and it was just a steep grade. it Normally runs along with my water temp.
I hooked the temp up to the scangauge 2, I keep a eye on the temps through the computer.
Doesn't hurt a thing.

i wish i could get my scan gauge to show trans temps went thought eh book and couldn;t find how to get it

Andy4639 · 10-08-2018, 06:38 PM

Quote:

Originally Posted by truckdude239

i wish i could get my scan gauge to show trans temps went thought eh book and couldn;t find how to get it

When they hooked my computer up they used the wrong ground on the computer. I had to move the ground wire for the temp senor to work.

truckdude239 read this. I got mine working by following this info.

If my info is correct then this is correct I have the yellow wire in spot 51 red connection. I don't have the grey in the 41 spot in the blue connector. I am also thinking it's a common ground wire though.

http://67-72chevytrucks.com/vboard/s...d.php?t=660747

**The Rocknrod** · 01-25-2019, 03:12 PM

Just went to Orielly's and found those transmission fittings as well - edelman 124640.
Also McMaster-Carr has them - https://www.mcmaster.com/6432t114
I forgot and bought both of them - hint don't order stuff online after cocktail hour.

10-04-2018, 12:44 PM	#1
Jbalgiere Registered User Join Date: Jun 2016 Location: Houston Posts: 11	4l80e Transmission Cooling I'm currently doing a lq9/4l80e swap and I'm plumbing the transmission lines. The plan was to use the factory transmission cooler in the radiator and then to a small auxiliary cooler then back to the trans. But while i was looking at how i was going to route my lines i realized the ports on the radiator are for 5/16 line but the 4l80e uses 3/8, so I'm wanting to know if running the lines to the radiator would create a restriction and i should just run the lines to a large transmission cooler and plug off the radiator. Any advice is appreciated! Thanks!!

10-04-2018, 03:13 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling I have a US Radiator with a heat exchanger for the ATF. I plan to use a 200R4 with 3/8" lines (calls for 5/16") I bought the adapters for the radiator out/in to 3/8" tube inverted flare fittings I plan to use. As you can see not much restriction at all. Attached Images __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-04-2018, 03:20 PM	#3
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling Also for the Trans side you use two of these, which are NPTS instead of NPT wich is incorrect: http://www.fitzall.com/31284G.php __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-04-2018, 03:22 PM	#4
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling And I believe these are for the Radiator side: http://store.fedhillusa.com/ad6br.aspx __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-04-2018, 03:24 PM	#5
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling These will make things a bit easier to fabricate: http://store.fedhillusa.com/cnf6.aspx Then all you need is tools and a bracket for the lines running next to the oil pan and that's easy enough. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-04-2018, 03:34 PM	#6
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling Or just get a messy and do this: https://www.ebay.com/itm/Automatic-T...!US!-1&vxp=mtr __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

10-04-2018, 03:49 PM	#7
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 4l80e Transmission Cooling I have the 6.0/4L80E in my 71. I used the cooler and ran aux cooler. My transmission has never gone over 200 with normal driving. It has with a trailer behind it but not for very long and it was just a steep grade. it Normally runs along with my water temp. I hooked the temp up to the scangauge 2, I keep a eye on the temps through the computer. Doesn't hurt a thing. Attached Images __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-04-2018, 05:59 PM	#8
Jbalgiere Registered User Join Date: Jun 2016 Location: Houston Posts: 11	Re: 4l80e Transmission Cooling Thanks guys for the help! So if I’m going to go through the radiator then to a cooler, what size auxiliary cooler do you guys think I need?

10-05-2018, 03:43 PM	#9
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 4l80e Transmission Cooling I went to O Reillys and bought the biggest one they had on hand. It has more than been enough! I also put one in my 64 SS Impala also. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-05-2018, 04:58 PM	#10
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling The 'Best' coolers are 'plate & Fin' coolers and they are stronger. The Tube & Fin coolers are not 'as' efficient and weaker. They cost more, you get more. It's your trany. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

01-25-2019, 03:12 PM	#13
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 4l80e Transmission Cooling Just went to Orielly's and found those transmission fittings as well - edelman 124640. Also McMaster-Carr has them - https://www.mcmaster.com/6432t114 I forgot and bought both of them - hint don't order stuff online after cocktail hour. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?



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