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Old 12-09-2019, 10:33 AM   #1
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What should i do

recommendations on new truck .
Picked up a new 2019 chevy 2500 double cab long bed . first thing i do is accessorize mostly to make truck my own .
Big question is transmission oil cooler . the truck comes with what appears to be a much better one then they used to have . brought truck down from Atlanta where i bought to Fort Myers fl . notice temps staid at 133 which is what my old truck does with the added external cooler . seems i shouldn't need to up-grade coolers ???? advice please . @nd thing is old truck i added a 180 t-stat and wondering if that would be recommended on new truck ???
Suggestions and recommendations from those in the know
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Old 12-09-2019, 10:46 AM   #2
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Leave the truck stock, no need to mess with anything, especially when nothing has shown the need to be upgraded or replaced. Cooler thermostats donít help anything and the trans cooler is more than sufficient. Enjoy the truck and donít overthink it or look for solutions for problems that donít exist.
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Old 12-09-2019, 10:46 AM   #3
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I don't think I'd do either until I pulled with it a few times.

A different t-stat can mess up all sorts of things. Being an HD truck I'd be surprised if you needed an upgraded tranny cooler.

How much are you pulling?
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Old 12-09-2019, 10:53 AM   #4
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You don't say what engine you have. Assuming it's the 6.0L, the thermostat should be GM PN 89018168.

https://www.gmpartsdepartment.com/oe...Y4LWdhcw%3D%3D

Googling this PN gets a number of sites that all say it is set for 187 deg F. So it's weird that you think it's running at 133 deg F.

https://www.summitracing.com/parts/ado-131-160/

https://www.apkiwshop.com/index.php?...ucts_id=142787

https://www.walmart.com/ip/GM-187-De...8168/807330111
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Old 12-09-2019, 11:08 AM   #5
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What should i do

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Originally Posted by rockfordroo View Post
You don't say what engine you have. Assuming it's the 6.0L, the thermostat should be GM PN 89018168.

https://www.gmpartsdepartment.com/oe...Y4LWdhcw%3D%3D

Googling this PN gets a number of sites that all say it is set for 187 deg F. So it's weird that you think it's running at 133 deg F.

https://www.summitracing.com/parts/ado-131-160/

https://www.apkiwshop.com/index.php?...ucts_id=142787

https://www.walmart.com/ip/GM-187-De...8168/807330111


I think you misread, he never said coolant temps were that low. He was talking about transmission temps.

If coolant temps were that low then he would get a check engine light.
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Old 12-09-2019, 11:10 AM   #6
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If he's pulling and he's up above 220-230 then I might think about a tranny cooler. Otherwise, it's not needed.
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Old 12-09-2019, 11:19 AM   #7
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Quote:
Originally Posted by rockfordroo View Post
You don't say what engine you have. Assuming it's the 6.0L, the thermostat should be GM PN 89018168.

https://www.gmpartsdepartment.com/oe...Y4LWdhcw%3D%3D

Googling this PN gets a number of sites that all say it is set for 187 deg F. So it's weird that you think it's running at 133 deg F.

https://www.summitracing.com/parts/ado-131-160/

https://www.apkiwshop.com/index.php?...ucts_id=142787

https://www.walmart.com/ip/GM-187-De...8168/807330111
The OP was talking about his transmission temp running at 133 degrees.
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Old 12-09-2019, 11:21 AM   #8
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The tranny will be ok, I pull 11k with mine and the tranny temp never goes over about 170F with the stock setup. My truck runs about 135F not pulling any load, even in the summer when the outside temp is 95-100.
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Old 12-09-2019, 11:34 AM   #9
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Quote:
Originally Posted by 007matman View Post
I don't think I'd do either until I pulled with it a few times...Being an HD truck I'd be surprised if you needed an upgraded tranny cooler.

How much are you pulling?
Agreed
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Old 12-09-2019, 11:37 AM   #10
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Don't mess with the thermostat. Modern vehicles (and trucks) are meant to run hotter than 180 degrees to aid (so they say) in complete combustion and lessen emissions. That's why the coolant mixture is so critical these days. Weak coolant or too much water and it will overheat. Also, your ECM (computer) looks for a certain temp. range set in the ECM by the factory and works with the numerous sensors to keep the engine running efficiently.

Your trans. temp running empty is really good. When towing 165 to 180 should be the normal range. If you find yourself running hotter than that consistently, then I would worry about adding an extra or bigger cooler.

Transmission Temperature Chart
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Old 12-09-2019, 11:57 AM   #11
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Quote:
Originally Posted by rockfordroo View Post
You don't say what engine you have. Assuming it's the 6.0L, the thermostat should be GM PN 89018168.

https://www.gmpartsdepartment.com/oe...Y4LWdhcw%3D%3D

Googling this PN gets a number of sites that all say it is set for 187 deg F. So it's weird that you think it's running at 133 deg F.

https://www.summitracing.com/parts/ado-131-160/

https://www.apkiwshop.com/index.php?...ucts_id=142787

https://www.walmart.com/ip/GM-187-De...8168/807330111





Tranny Temp . read post stays steady at 133 . engine temp is closer to 205
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Old 12-09-2019, 11:57 AM   #12
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The 165-180F trans temps before needing a cooler are from decades ago. Transmissions and factory synthetic fluids are good for well over 240F these days. Some transmissions, like Ford, run just over 200F on purpose and is controlled by a thermostat.

Unless you see over 240F frequently I wouldnít give it a second thought.
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Old 12-09-2019, 12:00 PM   #13
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Originally Posted by DieselDrax View Post
Leave the truck stock, no need to mess with anything, especially when nothing has shown the need to be upgraded or replaced. Cooler thermostats donít help anything and the trans cooler is more than sufficient. Enjoy the truck and donít overthink it or look for solutions for problems that donít exist.
I am thinking you are correct . imagine that coming from me
The old truck a 2003 the tranny cooler was very small and the external one i added made a huge difference . can't compare the new truck to the 03 but many things are the same . i was surprised to see the tranny temps running so cool on the drive back from atlanta breaking in the engine i kept speeds from 60 to 85 and varied rpms through out the trip . Thanks
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Old 12-09-2019, 12:02 PM   #14
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Originally Posted by Matheny9 View Post
The tranny will be ok, I pull 11k with mine and the tranny temp never goes over about 170F with the stock setup. My truck runs about 135F not pulling any load, even in the summer when the outside temp is 95-100.
Thanks was hoping to hear from other owners of the new chevy's my old 2003 2500 needed an external cooler but looks like chevy got on that and saving me some money
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Old 12-09-2019, 12:03 PM   #15
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I am thinking you are correct . imagine that coming from me
The old truck a 2003 the tranny cooler was very small and the external one i added made a huge difference . can't compare the new truck to the 03 but many things are the same . i was surprised to see the tranny temps running so cool on the drive back from atlanta breaking in the engine i kept speeds from 60 to 85 and varied rpms through out the trip . Thanks
With your '03 that was a good thing.. not with the new one. Completely different ballgame.

I had an '04 Denali and would have done it. I did it with my '10 Esky too (however, that one was retired when I bought my '07 F350).
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Old 12-09-2019, 12:06 PM   #16
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Originally Posted by DieselDrax View Post
The 165-180F trans temps before needing a cooler are from decades ago. Transmissions and factory synthetic fluids are good for well over 240F these days. Some transmissions, like Ford, run just over 200F on purpose and is controlled by a thermostat.

Unless you see over 240F frequently I wouldnít give it a second thought.

I would still be leary about consistently running my trans. at that temp. and for prolong periods. Even though I run synthetic just for those infrequent times I'm pulling hard up a long mountain.


More new technology coming down the pike!
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Old 12-09-2019, 12:19 PM   #17
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Originally Posted by rracer5 View Post
I would still be leary about consistently running my trans. at that temp. and for prolong periods. Even though I run synthetic just for those infrequent times I'm pulling hard up a long mountain.


More new technology coming down the pike!

Well, your Ram came with synthetic trans fluid from the factory. ATF+4 is synthetic.


GM trucks don't have a hot trans fluid warning come on until around 270F.


I know it's hard to teach old dogs new tricks, but consider how you don't hear about transmissions overheating and blowing up left and right these days compared to 3/4- and 1-ton automatic trucks from the early 2000s and prior. Then think about how many people just beat the snot out of their trucks towing more than they should at speeds faster than they should with the stock fluids and cooling...and how the transmissions still aren't failing.


Things have come a long way, sometimes you just have to take a step back and make adjustments to how you think rather than just assuming nothing has changed.
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Old 12-09-2019, 12:24 PM   #18
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Well, your Ram came with synthetic trans fluid from the factory. ATF+4 is synthetic.


GM trucks don't have a hot trans fluid warning come on until around 270F.


I know it's hard to teach old dogs new tricks, but consider how you don't hear about transmissions overheating and blowing up left and right these days compared to 3/4- and 1-ton automatic trucks from the early 2000s and prior. Then think about how many people just beat the snot out of their trucks towing more than they should at speeds faster than they should with the stock fluids and cooling...and how the transmissions still aren't failing.


Things have come a long way, sometimes you just have to take a step back and make adjustments to how you think rather than just assuming nothing has changed.
17 yrs since last truck and i'm finding out a lot has changed . Thanks for taking your time to educate me on the newer trucks
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Old 12-09-2019, 12:33 PM   #19
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Originally Posted by DieselDrax View Post
Well, your Ram came with synthetic trans fluid from the factory. ATF+4 is synthetic.


GM trucks don't have a hot trans fluid warning come on until around 270F.


I know it's hard to teach old dogs new tricks, but consider how you don't hear about transmissions overheating and blowing up left and right these days compared to 3/4- and 1-ton automatic trucks from the early 2000s and prior. Then think about how many people just beat the snot out of their trucks towing more than they should at speeds faster than they should with the stock fluids and cooling...and how the transmissions still aren't failing.


Things have come a long way, sometimes you just have to take a step back and make adjustments to how you think rather than just assuming nothing has changed.
Yes, I was aware of that. Just making the point that I make sure ALL my fluids are synthetic when being serviced and that just "adding an additive" is not the same (additives are on the shelves & I've heard it being said that it was). Synthetics give that little extra edge against fluid breakdown from heat.

X2 on the newer truck transmissions. They are getting a whole lot more durable.
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Old 12-09-2019, 12:46 PM   #20
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Yes, I was aware of that. Just making the point that I make sure ALL my fluids are synthetic when being serviced and that just "adding an additive" is not the same (additives are on the shelves & I've heard it being said that it was). Synthetics give that little extra edge against fluid breakdown from heat.

X2 on the newer truck transmissions. They are getting a whole lot more durable.
Oh, for sure. I only run synthetics as well. Highest temps I see from anything are oil temps when climbing a grade while towing at WOT for many minutes, it's not uncommon to see oil temps in the 250F range and synthetics do much better at these temps than conventional oil. Oil temps come down quickly once RPMs drop and the load on the engine goes down.


Really is a testament to modern vehicles that you can basically run them up hill at WOT while towing in the summer and not have to worry about temps getting out of control with the factory cooling.


Anyway, sounds like MR.M has got himself a nice truck that should put up with being put to work without needing outside help.
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