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 > Antifreeze in transmission 2010 Duramax??

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ivbinconned

highway 16

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Posted: 12/13/21 09:20am Link  |  Quote  |  Print  |  Notify Moderator

What’s going on here. How does this happen? And has it ruined my transmission?


Ram and 34 ft Cedar Creek

opnspaces

San Diego Ca

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Posted: 12/13/21 09:43am Link  |  Quote  |  Print  |  Notify Moderator

You have a leak in the transmission cooler that is inside your radiator. And yes it's very possible it has ruined the clutches in your transmission. You definitely need to get the radiator replaced and the transmission flushed multiple times. Then cross your fingers and hope that the transmission survived.
bottom line get the radiator fixed right now.


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Grit dog

Black Diamond, WA

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Posted: 12/13/21 10:08am Link  |  Quote  |  Print  |  Notify Moderator

^What he said.
And also a real kick in the nuts, as this is not a common issue. And not one to be expected nor prepare for. Especially in a vehicle that new ( unless it has a pile of miles on it maybe).


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Ivylog

Blairsville, GA and WPB, FL.

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Posted: 12/13/21 03:20pm Link  |  Quote  |  Print  |  Notify Moderator

X3 as it softens the clutch’s friction material.


This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
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Turtle n Peeps

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Posted: 12/13/21 04:02pm Link  |  Quote  |  Print  |  Notify Moderator

Well that sucks. [emoticon] Sounds like my luck.
In any event the glue that the tranny friction material is glued on with is water or antifreeze soluble. The friction material will be fine. The glue that holds it to the steels......not so much.
Don't ask me how I know. But mine was a cheap T350 I learned this lesson on and not a big buck Allie.
Good luck.


~ Too many freaks & not enough circuses ~


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bgum

South Louisiana

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Posted: 12/13/21 04:31pm Link  |  Quote  |  Print  |  Notify Moderator

When I was in school I worked at a full service filling station part-time. Customer came in and wanted a quart of antifreeze added. I caught one of my co-workers just before he added it to the crankcase oil. After that he wasn't allowed to raise a hood. He did learn how to clean the Grease bay, restrooms, and wash bay.

Turtle n Peeps

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Posted: 12/13/21 04:50pm Link  |  Quote  |  Print  |  Notify Moderator

bgum wrote:

When I was in school I worked at a full service filling station part-time. Customer came in and wanted a quart of antifreeze added. I caught one of my co-workers just before he added it to the crankcase oil. After that he wasn't allowed to raise a hood. He did learn how to clean the Grease bay, restrooms, and wash bay.


A friend I had in HS put 3 gallons of gas in a fresh water tank of a motorhome. That was not good!

ZR1

New Mexico

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Posted: 12/13/21 08:03pm Link  |  Quote  |  Print  |  Notify Moderator

ivbinconned, don't give up just yet. The issue of a failure of a transmission cooler in the radiator is a common problem for GM. The real issue how long did it go before you discovered the problem. In many cases you can simply replace the radiator, have the transmission flushed and the fluid replaced and you may be good to go. This is something you may want to consider before you just give up and purchase a transmission rebuild. Ultimately if the transmission has been toasted you can have a GM dealer replace the trans with a factory rebuild and you will get at 3 year 100k warranty to boot. Do your homework before you give up. You have lots of options!

ivbinconned

highway 16

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Posted: 12/13/21 11:25pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks ZR1
If my memory serves me correctly some older other GM vehicle I had a mechanic recommended disconnecting the Tran cooler lines at the radiator because of this kind of risk and we connected the oil lines to an aftermarket cooler installed in front of the rad.
Is this the right thing to do with this truck?

Tom_M

New Hope, MN

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Posted: 12/14/21 02:58am Link  |  Quote  |  Print  |  Notify Moderator

If your problem is the radiator, replace the whole radiator. You can then install an external cooler if you are worried about this happening again.


Tom
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