Rich&Mar
wa usa
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We will probably trade 5ers and go up in weight by about 1500 no more than 2000 lbs. The stock cooler I feel now just does the job. Temp goes up to 200 maybe 210 when climbing a mountain pass. I don't like to run that high for very long. So with the new weight I am thinking I need a bigger and or better cooler. Do you think so, and what is the best for the buck? It's for a 6L gas. thanks rich
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amxpress
Clayton, NC
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The bigger the better.
Heat is the #1 cause of automatic transmission failures. If you can keep the temperature down, it will last a whole lot longer.
I bought a tranny cooler from Summit Racing. They have a large selection of name brand coolers. They also offer over size tranmssion oil pans that keeps the fluid cooler.
http://www.summitracing.com/search/?keyword=transmission%20cooler&Ns=
I also use Amsoil Synthetic transmission fluid. Every little bit helps.
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smkettner
Southern California
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IMO 210 for 15 to 30 minutes climbing a hill is not an issue. Even 220/240 is fine as long as it cools quickly once over the top. I would get the new trailer first and see where the temps come in at. May have no effect.
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thomasinnv
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i would not suggest a larger pan. sure they take longer to heat up all that fluid, but they also take longer to cool it all down once it gets hot. i put in a max cool after market cooler and my tmps went from 200-210 pulling steep grades down to 170-180 on the same grades.
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tvman44
Southwest Louisiana
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If you buy another cooler and have enough room I would leave the old one in and use both for extra cooling.
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wolf_rver
Connecticut
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Sorry if there is an obvious answer, but how are you measuring the transmission temps?
Have you installed an aftermarket item, or do your TV's provide that info on the dash.
I only have an engine temp indicator on my dash.
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Gale Hawkins
Murray, KY
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You can add a sensor and gauge. Some buy something like a Scan Gauge that pulls it from the computer depending on the age, etc.
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LarryJM
NoVa
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Rich&Mar wrote:We will probably trade 5ers and go up in weight by about 1500 no more than 2000 lbs. The stock cooler I feel now just does the job. Temp goes up to 200 maybe 210 when climbing a mountain pass. I don't like to run that high for very long. So with the new weight I am thinking I need a bigger and or better cooler. Do you think so, and what is the best for the buck? It's for a 6L gas. thanks rich
Assuming you are using a real gauge or something that reads what the PCM/ECM sees like a Scangauge, the temps you are seeing under those conditions are not a problem. Having a real and accurate tranny temp gauge is the first step and documenting your base line w/o changes over a good variety of conditions is a must do first step otherwise you will have no idea after mods if you have helped or hurt. Here are some other random thoughts on this tranny cooling subject and it may or may not apply to your particular make of TV.
1. Larger tranny pans or those with fins, etc. are IMHO snake oil since while they might delay a big increase in temp caused by other reasons they provide little additional cooling and take much longer for that now hot fluid to cool off.
2. Simply adding more coolers especially in addition to what you already have can actually hurt more than help when you actually need additional cooling. This is because they can restrict the flow rate of the fluid or slow it down so the heat transfer is hurt and not helped. Most go bigger and see a good drop in temp and of course tooling around when it's not really needed you will see that, but when it's needed they can actually as I said make the problem worse.
3. One of the best tranny cooling systems are the ones that combine both a radiator OTW cooler and also an external OTA cooler.
4. I have found towing two things when you get the tranny temps up on a hard pull it can take 30 to even 45 minutes for them to come back down to a stable temp like on flat highway and than stable temp is usually about 10 to 20 deg higher than what you saw before it first heated up.
5. Cooler is not always better since trannies are designed to be most effecient somewhere in the 160 to 175 deg range and running them in like the 110 to 120 or cooler than the design temp are not only less efficient, but let any moisture in the fluid not evaporate as fast as a higher temp and water in a transmission is not a good thing.
Larry
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