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We need to brainstorm...Trans. heat...

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Old Jun 26, 2009 | 07:32 PM
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Default We need to brainstorm...Trans. heat...

I know the LS4's transmissions have problems with heat so I was thinking on putting a remote fan in front of the cooler I have. This way I can turn it on and off anytime I want. With the 85 degree day today and very high humidity I saw 221 degrees and it took a while to cool off. I already bypassed the radiator and it does take longer for the trans. to come up to temp. I was also thinking on running a 2nd cooler in tandem with the other one. One on each side of the radiator. I know that will keep it from going gover 200 degrees. What are your opinions guys? And please feel free to give some new ideas. Thanks in advance.

-Mike
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Old Jun 26, 2009 | 08:03 PM
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Your ideas sound good. I'll be keeping an eye on this, as I would like to keep trans/underhood temps down.
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Old Jun 26, 2009 | 08:04 PM
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Hey Mike

The addition of an electric fan is a definate bonus, mostly for stop`n go or traffic. Constant speed should naturally keep the temps down by just airflow alone.
There is also something else you can do:

http://www.lubegard.com/automotive/index.html

bump your tranny fluids reliability to 325* before brakedown

http://www.lubegard.com/automotive/trans_atf.html

Last edited by Ill_Born_ss; Jun 26, 2009 at 08:09 PM. Reason: forgot a link
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Old Jun 26, 2009 | 10:17 PM
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Make sure to keep your fluids flushed. I would go 25k miles or 2 years between flushes
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Old Jun 26, 2009 | 10:44 PM
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Aluminum finned pans. I think they're available. This coupled with the extra capacity afforded by a second cooler should do wonderfully.
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Old Jun 27, 2009 | 07:16 AM
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I already have an Aluminum finned pan (5 - 8 degree drop at most) and a large cooler and it still gets hot but just takes longer. Honestly, I dont't think there is enough surface area for the fluid to cool down as much. That leads me into thinking running them in tandem. I may try it just for $hit$ & giggles. lol...

-Mike

Last edited by Mgpeagle; Jun 27, 2009 at 09:21 AM.
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Old Jun 27, 2009 | 07:50 AM
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Originally Posted by Mgpeagle
I already have an Aluminum finned pan (5 - 8 degree drop at most) and a large cooler and it still gets hot but just takes longer. Honestly, I dont't think there is enogh surface area for the fluid to cool down as much. That leads me into thinking running them in tandem. I may try it just for $hit$ & giggles. lol...

-Mike
after you do yours how bout you drive over to ohio and do mine haha
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Old Jun 27, 2009 | 09:21 AM
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Sure, I'll be right over. lol...

-Mike
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Old Jun 27, 2009 | 02:51 PM
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my headlight and shaker hood keep the tranny about ten degrees cooler so hood heat extractors are good too
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Old Jun 27, 2009 | 03:27 PM
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I have removed the rubber moulding in the back of the engine so the heat escapes through the cowl. I'd love that hood Paul...

-Mike
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Old Jun 28, 2009 | 07:10 PM
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Paul is your trans am hood shaker functional?
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Old Jun 28, 2009 | 07:55 PM
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I think it's almost futile. When driving around downtown San Francisco last night the tranny reached 240* in stop and go traffic. Its been about 106-108 degrees today and within a just few mins of driving on the highway (no traffic) it reached 190 degrees. GM's design flaw, I'll let the warranty worry about it lol. Be interesting to see if you guys see some results for sure though.
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Old Jun 28, 2009 | 10:28 PM
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how do you guys know your trans temp? do the gxps haven a gauge?
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Old Jun 28, 2009 | 11:16 PM
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Originally Posted by TheMonteMan
how do you guys know your trans temp? do the gxps haven a gauge?

yeah on the DIC there is a trans temp. when you scroll through.
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Old Jun 29, 2009 | 09:48 AM
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yeah, us Montes/Impala's don't have that...
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Old Jun 29, 2009 | 10:35 AM
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Small electric fan should do the trick, you should relay it off something, besides just a switch you will forget. Maybe relay it off the stock fans?

Do you have a fan tune that turns your fans on at a lower temp?
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Old Jun 29, 2009 | 12:43 PM
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http://www.summitracing.com/parts/BMM-70297/
There was cheaper ones but that was at the top of the page. If you already have a cooler i'm sure you could piece it together but this one comes with everything.
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Old Jun 29, 2009 | 03:48 PM
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functional for heat extraction the back had two 2 inch and two 2.5 inch holes in the back were the fake vents are molded into the shaker really its probably a good way to get the temps down and heat does rise after all

heres an idea mostly partaining to me but how about a forward facing hoodscoop with the tranny cooler mounted where a carb would be on the intake mani. i have always liked the scoops with the butterflies....
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Old Jun 29, 2009 | 04:01 PM
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My transmission's 1st gear sounds really funny when hot...its almost a clunk then a whine until it shifts to second. Does that mean its on its way out?
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Old Jun 29, 2009 | 06:33 PM
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A clunk? A transmission will whine when it is low on fluid or there is a crack in the transmission filter. The filter is supposed to sit in the fluid and get sucked up to the pump. If the filter is cracked it will whine because it is drawing in air instead of fluid. Usually the crack is always on the top of the filter so no fluid will get sucked in since air is way less dense than trans fluid. I would check the fluid level and if it's Ok it is still fine to add 1/2 to 3/4 quart and if the whine goes away you need to change the filter an while you are at it put some new fluid in it too. It is reccommended to check the fluid in park on a level surface and make sure it is fully warmed up. To get an accurate reading the fluid needs to be 180* or more. Also, if you had any trans. work done lately make sure the dipstick tube isn't in too far or you will get a false full reading and then the trans. will start to whine.

If it is none of that it could be a bad T. Conv. or a bad input to sun bearing. The input to sun bearing sounds like a PS pump whine. I hope this helps you and good luck with it Nacho.

-Mike
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