Ok I'm a bit confused on the Trans cooler...

[GranPrix]

Excuse my ignorance right now, I haven't had the PPV long enough I guess. On our PPVs' the trans line goes into the radiator and then back out to the trans correct? So what is the small external cooler that we have in front of the radiator behind the grill? I haven't had a chance to follow the lines. I know the engine oil is the same as the trans but on the driver's side.

 

[kbuskill]

Excuse my ignorance right now, I haven't had the PPV long enough I guess. On our PPVs' the trans line goes into the radiator and then back out to the trans correct? So what is the small external cooler that we have in front of the radiator behind the grill? I haven't had a chance to follow the lines. I know the engine oil is the same as the trans but on the driver's side.

View attachment 214004

That is RPO option...

KNP HD AUX TRANS. COOLING SYSTEM

That is the factory auxiliary transmission cooler. Not all trucks have them. They usually come with the "Tow package" or the PPVs.

Check the RPO sticker in your glove box for KNP.

Some guys, like me, remove the aux cooler and replace it with a larger one.

 

[GranPrix]

No wonder, I was looking for the other "Kxx" option. I do have the KNP. Ok thanks. Well I don't tow anything so I should be good.

 

[Ilikemtb999]

And you’re not rated to tow very much anyways. You could pit maneuver all day long without your trans breaking a sweat though

 

[swathdiver]

Excuse my ignorance right now, I haven't had the PPV long enough I guess. On our PPVs' the trans line goes into the radiator and then back out to the trans correct? So what is the small external cooler that we have in front of the radiator behind the grill? I haven't had a chance to follow the lines. I know the engine oil is the same as the trans but on the driver's side.

View attachment 214004

Wow, 2 Whelen speakers! I've been wanting one for my PA system.

That "little" cooler does great work. Keeps the transmission plenty cool even on the hottest days.

 

[2011SSVHOE]

That "little" cooler does great work. Keeps the transmission plenty cool even on the hottest days.

I also Have the KNP rpo and I'm wondering how hot my trans can stand. I just bought a 26 ft travel trailer last week. towing it home the tranny temp reached 194 and the ambient temp was around 45, just wondering what to expect with ambient temps pushing 90? I have hear that 230 is about as hot as you would want to go. the camper wieghs in at 4700 lbs

 

[swathdiver]

I also Have the KNP rpo and I'm wondering how hot my trans can stand. I just bought a 26 ft travel trailer last week. towing it home the tranny temp reached 194 and the ambient temp was around 45, just wondering what to expect with ambient temps pushing 90? I have hear that 230 is about as hot as you would want to go. the camper wieghs in at 4700 lbs

These trucks were literally designed to traverse death valley while towing.

https://www.tahoeyukonforum.com/threads/gmt900-transmission-temperatures.104890/#post-1248415

 

[Doubeleive]

Excuse my ignorance right now, I haven't had the PPV long enough I guess. On our PPVs' the trans line goes into the radiator and then back out to the trans correct? So what is the small external cooler that we have in front of the radiator behind the grill? I haven't had a chance to follow the lines. I know the engine oil is the same as the trans but on the driver's side.

View attachment 214004

took mine out and put this one in
View media item 27546

 

[Trc54]

took mine out and put this one in
View media item 27546

What unit is that?

 

[Doubeleive]

What unit is that?

TRUCOOL 40K, without the bypass kit, if it gets really cold where you live then you may want to put in the bypass kit


https://www.ebay.com/itm/Tru-Cool-M...m3f1165f775:g:PAsAAOSw-jhUGz9x&frcectupt=true