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would you add an additional transmission cooler? #5436952 05/23/20 07:31 PM
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MrTruckDriver Offline OP
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hey everyone. my truck is a 2009 sierra 1500 4.8 vortec 4l60e trans 342 axle ratio. I replaced the stock trans cooler with a big derale stacked plate cooler fan combo. it has worked great and i run the fan when needed.
I went and bought a travel trailer that weighs just over 5000 lbs loaded. when climbing grades the temp has gotten up to 190F. me being me i want to add another stacked plate trans cooler. I'm wondering if this could be a bad idea? the very coldest it gets out my way is -4F.
thanks.
I'm curious what others would do.


Last edited by MrTruckDriver; 05/23/20 07:32 PM.
Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436953 05/23/20 07:33 PM
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Rand Offline
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190f isnt that hot for those working conditions.


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436954 05/23/20 07:37 PM
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bbhero Offline
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What may well be more helpful is getting a bigger transmission oil pan too... Adding 2 quarts of extra transmission oil could really help cool the operating temp.

Clinebarger on here recommends this and one or two other changes that really good and helpful with cooling transmissions like yours.


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Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436957 05/23/20 07:40 PM
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69GTX Offline
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190F is probably fine. Would be an issue if you were 30-60 deg hotter. Even if it gets hotter, you can always change the fluid more often since the break down will be faster at higher temps.

You're lucky. My Ford AX4N just pulls around its own weight in a 2001 Lincoln with FWD and I'd love to have your problem.


----------------

2001 Lincoln Cont 4.6L DOHC/ 50K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436958 05/23/20 07:40 PM
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spasm3 Online Happy
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Instead of 2 coolers. Install 1 large one.

Tru-cool LPD-47391. It's a 40,000 gvw unit.

I'm towing a 6200-6500 trailer with my avalanche.

Temps run 145-160 towing. Highest I have had is 175 on a 90 degree day. Plumb the hot fluid through the radiator then through the cooler.

Don't bypass the radiator.

Last edited by spasm3; 05/23/20 07:41 PM.

13 elantra 84k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 19000 miles m1 0w30
Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436959 05/23/20 07:41 PM
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nascarnation Offline
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Is 190F the engine coolant temp or the transmission sump temp or transmission converter out temp?

Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436967 05/23/20 07:52 PM
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MrTruckDriver Offline OP
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thanks everyone. my current cooler is the derale 13960 rated at 46,000 btus per hour. the temp gauge is stock and im assuming the sensor is in the pan area.
i will look into a deeper pan the only concern i have is getting it around the exhaust. the one i have now just fits if i remember correctly.

Re: would you add an additional transmission cooler? [Re: spasm3] #5436977 05/23/20 07:58 PM
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bbhero Offline
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Originally Posted by spasm3
Instead of 2 coolers. Install 1 large one.

Tru-cool LPD-47391. It's a 40,000 gvw unit.

I'm towing a 6200-6500 trailer with my avalanche.

Temps run 145-160 towing. Highest I have had is 175 on a 90 degree day. Plumb the hot fluid through the radiator then through the cooler.

Don't bypass the radiator.



This is a good idea here too ↑↑↑↑↑

I do think I remember clinebarger using a bigger transmission oil pan on that transmission... Could be wrong but I think I could be right.


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"Treat your family like your friends and treat your friends like your family."
Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436981 05/23/20 08:02 PM
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Marco620 Offline
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Using a better fluid from Redline or Amsoil might help too. I upgraded from OE Honda CVT and got a better performance product for less monies.


15' Civic r18, 342,000 mi M1 0w30(3qt)/Redline 5w30(1qt),Castrol CVT Fluid,Redline Si-1
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Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436982 05/23/20 08:02 PM
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I would if it was mine, I don't think it's possible to over cool the fluid. I wanted to add one to my vehicle because I figured it would be beneficial for a CVT (pretty sure I read that here) but, the local transmission shop said it was not necessary if I didn't drive it hard (whatever that means).

Last edited by GSCJR; 05/23/20 08:14 PM.

07 3.5L VQ35DE NAPA FS 5w-20 ProSelect 21358 158KM
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Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436983 05/23/20 08:03 PM
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I don't see where a bigger pan helps unless you're only using the truck to pull in short bursts, more fluid will take longer to come up to temperature but will just heat soak the same as with a smaller pan when towing a distance.

Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436984 05/23/20 08:03 PM
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AZjeff Offline
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Are you running synthetic fluid? 190 is no big deal for synthetic.



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Re: would you add an additional transmission cooler? [Re: AZjeff] #5436995 05/23/20 08:16 PM
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MrTruckDriver Offline OP
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Originally Posted by AZjeff
Are you running synthetic fluid? 190 is no big deal for synthetic.


im running that mobil dexron vi synthetic blend. i think the short answer is no lol.

Re: would you add an additional transmission cooler? [Re: MrTruckDriver] #5436997 05/23/20 08:16 PM
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Chris142 Offline
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If you add another cooler T off run them in paralel instead of in series.


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Re: would you add an additional transmission cooler? [Re: GSCJR] #5437009 05/23/20 08:31 PM
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Originally Posted by GSCJR
I would if it was mine, I don't think it's possible to over cool the fluid. I wanted to add one to my vehicle because I figured it would be beneficial for a CVT (pretty sure I read that here) but, the local transmission shop said it was not necessary if I didn't drive it hard (whatever that means).


i was reading the service intervals in my owners manual and it looks like just about any use would fall under severe duty. i wouldn't be surprised if driving it hard was stop and go traffic with some hills.

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