Tranny Cooler? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mike73 · 07-31-2009, 02:38 AM

OK I swapped in a 350/700R combo from an 84 burban that had a HD radiator. My question is what size of external aftermarket tranny cooler should I be looking into. Ive got a 66 short wide pretty much a cruiser got a 1 ton for towing duty so pullin a trailer wont be an issue. Thanks in advance!

mike73 · 07-31-2009, 03:11 PM

Any takers on this one?

Bazooka · 07-31-2009, 03:20 PM

I'd like to know the answer to this myself.

Big Fenders · 07-31-2009, 08:41 PM

Go to Jeggs or Summit Racing and check out what they offer in trans coolers. Usually rated in GVW.
Bob

protrash64 · 07-31-2009, 11:17 PM

I used a B&M stacked plate type with some huge GVW. I think it was 20K. I figured it would be enough if I got the biggest one.

mike73 · 07-31-2009, 11:56 PM

Hows it workin out for you Protrash? I just have concerns about the 700R cooling from what Ive read its the number 1 killer errr cooling that is.....

protrash64 · 08-01-2009, 12:25 PM

Quote:

Originally Posted by mike73

Hows it workin out for you Protrash? I just have concerns about the 700R cooling from what Ive read its the number 1 killer errr cooling that is.....

So far fine, but its complete overkill and I dont drive much. The killer of the 700r4 is the TV cable. Add a temp guage to monitor your trans. I will be adding gauges to both trucks someday

. I've read the same info and I think they recommend staying under 250*? Going by memory on that, so dont beat me.

mike73 · 08-01-2009, 01:00 PM

Good info!

Big Fenders · 08-01-2009, 08:48 PM

Be aware that you can get a tranny cooler that keeps the fluid too cool which results in shift problems.
Bob

markeb01 · 08-01-2009, 09:14 PM

My only advice is to get one with minimum 3/8" (preferably 1/2") hose connectors. Years ago I had a stock 350 Chevy crate motor with a stock 350 auto with shift kit, and the external trans cooler generated so much pressure it ballooned the torque coverter, which in turn pushed the crank forward and wiped out my block. It was a very expensive learning experience.

I don't actually remember what size the fitters were but looking at the current models they were probably 11/32" which is just bigger than 5/16".

mike73 · 08-01-2009, 09:48 PM

my trucks a mutt, what is the GVW on a short wide?

**Captainfab** · 08-02-2009, 12:15 AM

I think it is about 5500

What was said about over cooling is true, however I have the big cooler (20,000 GVW) on my Suburban and have had no issues......been lucky. If you are going to run just an external cooler, consider plumbing in a thermostatic control valve, like THIS one. This will help the tranny get up to operating temperature.

Quote:

Originally Posted by mike73

my trucks a mutt, what is the GVW on a short wide?

LostMy65 · 10-26-2013, 10:00 PM

Quote:

Originally Posted by Captainfab

I think it is about 5500

What was said about over cooling is true, however I have the big cooler (20,000 GVW) on my Suburban and have had no issues......been lucky. If you are going to run just an external cooler, consider plumbing in a thermostatic control valve, like THIS one. This will help the tranny get up to operating temperature.

Old thread, but good suggestion regarding the control valve.
That was my concern regarding cold NW days.
I wondered about putting the cooler behind the radiator for the warmer air.

NEWFISHER · 10-26-2013, 11:36 PM

I use an external linear dual pass cooler on the frame rail on the 50 Burb with the 700r4. It has the OE style brass radiator still and I didn't want to ditch it. The 700r4 will not shift into 4th gear until the fluid gets to operating temp through an internal temp sensor and protects it. It shifts fine when cold through 3 gears until 10 miles then 4th comes in. 25,000 and still doing well. I haul a 20 foot 1960 travel trailer every weekend in the summer and the linear cooler does a great job. Also have been in hot stop and go cruises with no boil over. I recommend the thermostat system, have had them on past rigs, but never got around to installing one on the burb. The 65 with a 700r4 runs through a newer radiator with the trans cooler integrated into it and hard lined to the trans. Planning on a B&M or Hayden stacked style cooler air to oil on the front of the radiator mounted on its own bracket. The pull zip pads they give you in the kit can work loose and cause radiator issues over time.

LostMy65 · 01-20-2016, 07:59 PM

I bought this one.
Just got it installed, but haven't ran the truck yet.
It's supposed to restrict flow until it reaches the best operating temperature.

Amazon.com: B&M 70268 SuperCooler Automatic...

boucher racing · 01-20-2016, 11:55 PM

Hayden 679 is what you need.

07-31-2009, 02:38 AM	#1
mike73 Registered User Join Date: Jul 2009 Location: Los Lunas NewMexico Posts: 60	Tranny Cooler? OK I swapped in a 350/700R combo from an 84 burban that had a HD radiator. My question is what size of external aftermarket tranny cooler should I be looking into. Ive got a 66 short wide pretty much a cruiser got a 1 ton for towing duty so pullin a trailer wont be an issue. Thanks in advance!

07-31-2009, 03:11 PM	#2
mike73 Registered User Join Date: Jul 2009 Location: Los Lunas NewMexico Posts: 60	Re: Tranny Cooler? Any takers on this one?

07-31-2009, 03:20 PM	#3
Bazooka Keepin it old school Join Date: Jul 2008 Location: Ca Posts: 672	Re: Tranny Cooler? I'd like to know the answer to this myself.

07-31-2009, 08:41 PM	#4
Big Fenders Registered User Join Date: Mar 2008 Location: Tucson Arizona Posts: 264	Re: Tranny Cooler? Go to Jeggs or Summit Racing and check out what they offer in trans coolers. Usually rated in GVW. Bob

07-31-2009, 11:17 PM	#5
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: Tranny Cooler? I used a B&M stacked plate type with some huge GVW. I think it was 20K. I figured it would be enough if I got the biggest one. __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device

07-31-2009, 11:56 PM	#6
mike73 Registered User Join Date: Jul 2009 Location: Los Lunas NewMexico Posts: 60	Re: Tranny Cooler? Hows it workin out for you Protrash? I just have concerns about the 700R cooling from what Ive read its the number 1 killer errr cooling that is.....

08-01-2009, 01:00 PM	#8
mike73 Registered User Join Date: Jul 2009 Location: Los Lunas NewMexico Posts: 60	Re: Tranny Cooler? Good info!

08-01-2009, 08:48 PM	#9
Big Fenders Registered User Join Date: Mar 2008 Location: Tucson Arizona Posts: 264	Re: Tranny Cooler? Be aware that you can get a tranny cooler that keeps the fluid too cool which results in shift problems. Bob

08-01-2009, 09:14 PM	#10
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: Tranny Cooler? My only advice is to get one with minimum 3/8" (preferably 1/2") hose connectors. Years ago I had a stock 350 Chevy crate motor with a stock 350 auto with shift kit, and the external trans cooler generated so much pressure it ballooned the torque coverter, which in turn pushed the crank forward and wiped out my block. It was a very expensive learning experience. I don't actually remember what size the fitters were but looking at the current models they were probably 11/32" which is just bigger than 5/16".

08-01-2009, 09:48 PM	#11
mike73 Registered User Join Date: Jul 2009 Location: Los Lunas NewMexico Posts: 60	Re: Tranny Cooler? my trucks a mutt, what is the GVW on a short wide?

10-26-2013, 11:36 PM	#14
NEWFISHER Registered User Join Date: Sep 2012 Location: Oregon Posts: 3,303	Re: Tranny Cooler? I use an external linear dual pass cooler on the frame rail on the 50 Burb with the 700r4. It has the OE style brass radiator still and I didn't want to ditch it. The 700r4 will not shift into 4th gear until the fluid gets to operating temp through an internal temp sensor and protects it. It shifts fine when cold through 3 gears until 10 miles then 4th comes in. 25,000 and still doing well. I haul a 20 foot 1960 travel trailer every weekend in the summer and the linear cooler does a great job. Also have been in hot stop and go cruises with no boil over. I recommend the thermostat system, have had them on past rigs, but never got around to installing one on the burb. The 65 with a 700r4 runs through a newer radiator with the trans cooler integrated into it and hard lined to the trans. Planning on a B&M or Hayden stacked style cooler air to oil on the front of the radiator mounted on its own bracket. The pull zip pads they give you in the kit can work loose and cause radiator issues over time.

01-20-2016, 07:59 PM	#15
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,525	Re: Tranny Cooler? I bought this one. Just got it installed, but haven't ran the truck yet. It's supposed to restrict flow until it reaches the best operating temperature. Amazon.com: B&M 70268 SuperCooler Automatic... __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

01-20-2016, 11:55 PM	#16
boucher racing Registered User Join Date: Feb 2009 Location: Nashville TN Posts: 294	Re: Tranny Cooler? Hayden 679 is what you need. __________________ Build Threads: "JED" 66 GMC C1000 http://inliners.org/ubbthreads/ubbth...1857#Post61857 "Cropwell" 66 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=587639



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