tranny cooler suggestions( 700r4) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dirish · 07-10-2013, 09:48 AM

Anyone w/ the 700r4 running no cooler?
Installing soon lining up parts, suggestions or experiences
Good or bad please. Running a mild 350. Thanks!
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slow-1 · 07-10-2013, 11:05 AM

I have run a 700r4 for 11 years without an additional trans cooler (just the radiator), I occasionally pull a 4000 pound boat to the coast, 400 miles round trip...still works like it should.
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dirish · 07-10-2013, 11:53 AM

Quote:

Originally Posted by slow-1

I have run a 700r4 for 11 years without an additional trans cooler (just the radiator), I occasionally pull a 4000 pound boat to the coast, 400 miles round trip...still works like it should.
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Thank you for the info! Truck may get 150 miles a month if that.
Maybe more with new tranny.

Goes in shop tonight. This was a
Last minute thought.
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chopnchaneled · 07-10-2013, 03:47 PM

Betting you will be driving it more

wait a minute, what ratio is your diff?

dirish · 07-10-2013, 04:26 PM

Quote:

Originally Posted by chopnchaneled

Betting you will be driving it more

wait a minute, what ratio is your diff?

3.73
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slow-1 · 07-10-2013, 05:39 PM

You will definately like it.

Has anyone come up with a better way to lock the converter when not in OD? I have a little toggle switch under the dash that works great, but I am always scared I will forget to turn it on when towing.
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dirish · 07-10-2013, 06:00 PM

Quote:

Originally Posted by slow-1

You will definately like it.

Has anyone come up with a better way to lock the converter when not in OD? I have a little toggle switch under the dash that works great, but I am always scared I will forget to turn it on when towing.
Posted via Mobile Device

I believe its built to lock up in fourth only. Has one wire, goes to
A 12volt power. He said i could have a switch if i wanted, but not necessary.
I wont be towing either. Im not a mechanic, so i may have miss spoke somewhere.
done alot of reading, and listening, still learning.
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67anthony · 07-10-2013, 06:07 PM

Run mine thought the radiator works fine.

heathbirkendahl · 07-10-2013, 08:29 PM

So the toggle switch is optional if not towing?

I will not be towing. Won't say never but I don't own a trailer or a boat. LOL

dirish · 07-11-2013, 06:39 AM

Quote:

Originally Posted by heathbirkendahl

So the toggle switch is optional if not towing?

I will not be towing. Won't say never but I don't own a trailer or a boat. LOL

I believe its how it is built, mine will lock in fourth, which is ok
After a 3sp tranny for so long. Will help my rpms stay lower. Im looking
For engine life as well as miles. But ask a tranny man to be sure.
I dont always grasp what my tranny guy says. Truck is At shop as of last night!
Let the games begin.
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slow-1 · 07-11-2013, 09:32 AM

The way mine works (sounds the same as the others) is that the converter locks up automatically when it shifts to 4th (OD), if I put the gear selector in 1,2,or 3, I flip the toggle switch that locks up the converter. I only shift to 3rd when I am towing my big boat to keep the revs up a bit, just works better. You may use 1st or second in a traffic jam or cruisin the strip at a rod run (but you probably dont need to lock it up then).

One time I forgot to flip the toggle towing the big boat (4000#) and the trans got hot FAST, flipped switch and it went right back to normal.

Wiring the toggle is very easy, fuse box to toggle to plug on trans.
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ironroad9c1 · 07-11-2013, 11:02 AM

Always put the biggest cooler you can find, for every 20 degrees you lower the trans fluid temp, you double the life of your transmission. problem with heat in a transmission is it hardens the rubber seals, then you get pressure leaks and then it starts slipping clutches and goes to hell from there, never hurts to install a cooler. the newer stacked type coolers work much better than the old fin and tube types.

Katrina/10 · 07-11-2013, 01:38 PM

What about the old story, "Don't tow in overdrive with a 700R4?" Is that true?

Longhorn 70 · 07-11-2013, 01:45 PM

Quote:

Originally Posted by Katrina/10

What about the old story, "Don't tow in overdrive with a 700R4?" Is that true?

That is how I roll.

dirish · 07-11-2013, 02:32 PM

I've always been told, no OD when pulling weight.?
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Katrina/10 · 07-11-2013, 03:27 PM

Quote:

Originally Posted by Longhorn 70

That is how I roll.

So you are towing in overdrive with the converter locked? I have one of these transmissions in my 71, and want to know if I can get away with that.

Longhorn 70 · 07-11-2013, 03:44 PM

DON'T tow or haul heavy in Overdrive is how I roll.

Katrina/10 · 07-11-2013, 04:01 PM

Quote:

Originally Posted by Longhorn 70

DON'T tow or haul heavy in Overdrive is how I roll.

Got it, thanks.

07-10-2013, 09:48 AM	#1
dirish Registered User Join Date: Dec 2012 Location: Heart of Tennessee Posts: 1,120	tranny cooler suggestions( 700r4) Anyone w/ the 700r4 running no cooler? Installing soon lining up parts, suggestions or experiences Good or bad please. Running a mild 350. Thanks! Posted via Mobile Device

07-10-2013, 11:05 AM	#2
slow-1 Registered User Join Date: May 2013 Location: Central NC Posts: 830	Re: tranny cooler suggestions( 700r4) I have run a 700r4 for 11 years without an additional trans cooler (just the radiator), I occasionally pull a 4000 pound boat to the coast, 400 miles round trip...still works like it should. Posted via Mobile Device

07-10-2013, 03:47 PM	#4
chopnchaneled Registered User Join Date: Dec 2009 Location: Atlanta, Ga. Posts: 1,050	Re: tranny cooler suggestions( 700r4) Betting you will be driving it more wait a minute, what ratio is your diff? __________________ I don't think we get smarter as we get older. We just run out of Stupid things to do.

07-10-2013, 05:39 PM	#6
slow-1 Registered User Join Date: May 2013 Location: Central NC Posts: 830	Re: tranny cooler suggestions( 700r4) You will definately like it. Has anyone come up with a better way to lock the converter when not in OD? I have a little toggle switch under the dash that works great, but I am always scared I will forget to turn it on when towing. Posted via Mobile Device

07-10-2013, 06:07 PM	#8
67anthony Registered User Join Date: Jun 2011 Location: mississippi Posts: 444	Re: tranny cooler suggestions( 700r4) Run mine thought the radiator works fine.

07-10-2013, 08:29 PM	#9
heathbirkendahl Registered User Join Date: Jul 2012 Location: Campbell, CA Posts: 452	Re: tranny cooler suggestions( 700r4) So the toggle switch is optional if not towing? I will not be towing. Won't say never but I don't own a trailer or a boat. LOL __________________ 1971 C/10 - Orange & White 2009 GMC 1500 - Lowered 3/4 22' KMC Slides

07-11-2013, 09:32 AM	#11
slow-1 Registered User Join Date: May 2013 Location: Central NC Posts: 830	Re: tranny cooler suggestions( 700r4) The way mine works (sounds the same as the others) is that the converter locks up automatically when it shifts to 4th (OD), if I put the gear selector in 1,2,or 3, I flip the toggle switch that locks up the converter. I only shift to 3rd when I am towing my big boat to keep the revs up a bit, just works better. You may use 1st or second in a traffic jam or cruisin the strip at a rod run (but you probably dont need to lock it up then). One time I forgot to flip the toggle towing the big boat (4000#) and the trans got hot FAST, flipped switch and it went right back to normal. Wiring the toggle is very easy, fuse box to toggle to plug on trans. Posted via Mobile Device

07-11-2013, 11:02 AM	#12
ironroad9c1 Master Hater Join Date: Apr 2006 Location: Temple,Tx. Posts: 402	Re: tranny cooler suggestions( 700r4) Always put the biggest cooler you can find, for every 20 degrees you lower the trans fluid temp, you double the life of your transmission. problem with heat in a transmission is it hardens the rubber seals, then you get pressure leaks and then it starts slipping clutches and goes to hell from there, never hurts to install a cooler. the newer stacked type coolers work much better than the old fin and tube types. __________________ 1997 C1500 ECSB 4.3/NV3500 8.5 3.42 "This evening, all of you bleeding hearts... why don't just go ahead and hug yourself for the next 20 minutes or so, because there's a really good chance you're gonna be offended".- Captain Owen Honors

07-11-2013, 01:38 PM	#13
Katrina/10 Registered User Join Date: Oct 2010 Location: Ocean Springs, MS Posts: 1,746	Re: tranny cooler suggestions( 700r4) What about the old story, "Don't tow in overdrive with a 700R4?" Is that true? __________________ Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100

07-11-2013, 02:32 PM	#15
dirish Registered User Join Date: Dec 2012 Location: Heart of Tennessee Posts: 1,120	Re: tranny cooler suggestions( 700r4) I've always been told, no OD when pulling weight.? Posted via Mobile Device

07-11-2013, 03:44 PM	#17
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: tranny cooler suggestions( 700r4) DON'T tow or haul heavy in Overdrive is how I roll. __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 Last edited by Longhorn 70; 07-11-2013 at 03:56 PM.

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