4L65 trans cooler adapter sizes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

'68 Newtricks · 06-24-2014, 01:10 AM

Looking to trade my factory hard lines for some braided AN lines. I've got these two sizes pulled up from Summit Racing. These seem to be the two sizes I've read about.

Not sure if they are metric or NPS
Out of a 2005 Yukon XL, 4L65e

http://www.summitracing.com/parts/rus-640520

http://www.summitracing.com/parts/rus-670520

Anyone know which size the trans uses?

Thanks all

aggie91 · 06-24-2014, 12:26 PM

I used the first one listed with the 1/4 NPS in my 4L60E trans. I am pretty sure that the 4L65e case did not change that port.

I ran -6 braided line all the way to the cooler mounted in front. I used a factory HD cooler that used the same fittings on it to adapt the AN line to it. Worked out great.

'68 Newtricks · 06-24-2014, 12:44 PM

I found the second fittings on another website that specified them as 4L65 adapters.

So I'm all confused cause I've read exactly what you've typed from others too

BR3W CITY · 06-24-2014, 01:46 PM

My 80e used the straight 0-ring fittings as well (but the 80e has a specialized fitting set).

The th350 up through the EARLY 90's 80e's all used the 1/4 NPSM o-ring fittings, literally every trans. If you look at the stock part, its the PTC with a 1/4 NPSM on the other side.

'68 Newtricks · 06-24-2014, 02:55 PM

Ok
What I'll do then is just order both and send whatever doesn't work back. I hope it's the second link since they are cheaper

I'll report back the results.

aggie91 · 06-24-2014, 03:00 PM

I looked at a few transmission sites and there seems to be some conflicting info out there. Bowler and TCI show them to be the same, but a couple of others show different part numbers for each trans, but no specs on what threads they are.

wgeyer88 · 06-24-2014, 04:23 PM

Check out this link:

http://www.sweetperformance.com/prod...product_id=480

BR3W CITY · 06-24-2014, 06:46 PM

Bowler is right, because....Bowler.

clinebarger · 06-24-2014, 07:02 PM

Starting on 11-29-07 the cooler line fittings changed to 9/16-18 thread, Before 11-29-07 the fittings are 1/4" NPSM on ALL 4L60E, 4L65E, & 4L70E, NO confusion, This is from a GM TSB.

solidaxel · 06-24-2014, 10:54 PM

Quote:

Originally Posted by clinebarger

Starting on 11-29-07 the cooler line fittings changed to 9/16-18 thread, Before 11-29-07 the fittings are 1/4" NPSM on ALL 4L60E, 4L65E, & 4L70E, NO confusion, This is from a GM TSB.

Thanks, that just confirmed my question on a 2003 4l65E

06-24-2014, 01:10 AM	#1
'68 Newtricks Registered User Join Date: Feb 2014 Location: Los Angeles area :( Posts: 499	4L65 trans cooler adapter sizes Looking to trade my factory hard lines for some braided AN lines. I've got these two sizes pulled up from Summit Racing. These seem to be the two sizes I've read about. Not sure if they are metric or NPS Out of a 2005 Yukon XL, 4L65e http://www.summitracing.com/parts/rus-640520 http://www.summitracing.com/parts/rus-670520 Anyone know which size the trans uses? Thanks all __________________ '68 C10 SWB '85 K30 Blazer

06-24-2014, 12:26 PM	#2
aggie91 I'm just glad to be here! Join Date: Jan 2008 Location: Longview, TX Posts: 4,788	Re: 4L65 trans cooler adapter sizes I used the first one listed with the 1/4 NPS in my 4L60E trans. I am pretty sure that the 4L65e case did not change that port. I ran -6 braided line all the way to the cooler mounted in front. I used a factory HD cooler that used the same fittings on it to adapt the AN line to it. Worked out great. __________________ Karl 1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square

06-24-2014, 12:44 PM	#3
'68 Newtricks Registered User Join Date: Feb 2014 Location: Los Angeles area :( Posts: 499	Re: 4L65 trans cooler adapter sizes I found the second fittings on another website that specified them as 4L65 adapters. So I'm all confused cause I've read exactly what you've typed from others too __________________ '68 C10 SWB '85 K30 Blazer

06-24-2014, 01:46 PM	#4
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 4L65 trans cooler adapter sizes My 80e used the straight 0-ring fittings as well (but the 80e has a specialized fitting set). The th350 up through the EARLY 90's 80e's all used the 1/4 NPSM o-ring fittings, literally every trans. If you look at the stock part, its the PTC with a 1/4 NPSM on the other side. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

06-24-2014, 02:55 PM	#5
'68 Newtricks Registered User Join Date: Feb 2014 Location: Los Angeles area :( Posts: 499	Re: 4L65 trans cooler adapter sizes Ok What I'll do then is just order both and send whatever doesn't work back. I hope it's the second link since they are cheaper I'll report back the results. __________________ '68 C10 SWB '85 K30 Blazer

06-24-2014, 03:00 PM	#6
aggie91 I'm just glad to be here! Join Date: Jan 2008 Location: Longview, TX Posts: 4,788	Re: 4L65 trans cooler adapter sizes I looked at a few transmission sites and there seems to be some conflicting info out there. Bowler and TCI show them to be the same, but a couple of others show different part numbers for each trans, but no specs on what threads they are. __________________ Karl 1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square Last edited by aggie91; 06-24-2014 at 03:05 PM.

06-24-2014, 04:23 PM	#7
wgeyer88 Registered User Join Date: Aug 2012 Location: Denver, Co Posts: 245	Re: 4L65 trans cooler adapter sizes Check out this link: http://www.sweetperformance.com/prod...product_id=480 __________________ Will 1970 CST10 SWB LQ4/4L80E 2004 Silverado (sold) 2007.5 Dodge Ram 2500

06-24-2014, 06:46 PM	#8
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 4L65 trans cooler adapter sizes Bowler is right, because....Bowler. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

06-24-2014, 07:02 PM	#9
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 4L65 trans cooler adapter sizes Starting on 11-29-07 the cooler line fittings changed to 9/16-18 thread, Before 11-29-07 the fittings are 1/4" NPSM on ALL 4L60E, 4L65E, & 4L70E, NO confusion, This is from a GM TSB.

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