Aftermarket cooler and bypass

[Mooseman]

These products are certainly interesting for me since I tow a lot.

PPE Transmission Cooler 2019-2023 Silverado Sierra | Duramax News

Boost your transmission a performance with this PPE Bar and Plate Transmission Fluid Cooler. Bigger effective cooling area and thicker core enables PPE cooler to draw 200% more heat from your transmission fluid compared to the factory cooler. We observed up to 45°F temperature drop with PPE...

www.demonworkshop.com

2019-2024 GM 3.0L w/ 10L80 Transmission - Transmission Fluid Thermal Bypass Valve

Transmission Fluid Thermal Bypass Block - GM 3.0L Duramax 10L80

ppepower.com

Although I haven't overheated the tranny while towing (maybe saw ~205f max while towing), I'm usually the preventive type. I especially don't like the thermal bypass which doesn't let fluid go to the cooler until it reaches a certain temp. Mine seems to hang around ~195f during normal driving.

Both aren't cheap $351 and $126USD respectively + shipping. PPE ships to Canada for $44 but Demonworks for the cooler doesn't but ships for free to a US address. PPE will ship to a US address for $14.

My biggest concern would be if I ever do have a failure that needs warranty work, they would refuse it because of these mods. Is there a precedent for this type of claim?

 

[BoostN]

As always, the dealer has to provide the failure was related to the modification. Generally, it's a fight and something I would try to avoid in general unless the aftermarket product is just THAT much better.

My $.02

 

[Mooseman]

So far I haven't seen the need for it unless I start travelling in the US desert areas or doing crazy hill climbs in BC. Still good to know these products are available, especially the cooler.

I have found a slightly cheaper alternative to the PPE cooler bypass block. This kit works with our 10L90E as per their video:

Superior STL010 | Superior Transmission Parts - The problem solvers of the transmission industry

I also like that if there is blockage either in the line or cooler, it will bypass the cooler although the tranny will still overheat.

The stock tranny cooler already looks pretty beefy compared to old radiator and external coolers. If the thermal bypass is disabled and full flow to the cooler is allowed, it should be sufficient.

 

[gemarsh]

These products are certainly interesting for me since I tow a lot.

PPE Transmission Cooler 2019-2023 Silverado Sierra | Duramax News

Boost your transmission a performance with this PPE Bar and Plate Transmission Fluid Cooler. Bigger effective cooling area and thicker core enables PPE cooler to draw 200% more heat from your transmission fluid compared to the factory cooler. We observed up to 45°F temperature drop with PPE...

www.demonworkshop.com

2019-2024 GM 3.0L w/ 10L80 Transmission - Transmission Fluid Thermal Bypass Valve

Transmission Fluid Thermal Bypass Block - GM 3.0L Duramax 10L80

ppepower.com

Although I haven't overheated the tranny while towing (maybe saw ~205f max while towing), I'm usually the preventive type. I especially don't like the thermal bypass which doesn't let fluid go to the cooler until it reaches a certain temp. Mine seems to hang around ~195f during normal driving.

Both aren't cheap $351 and $126USD respectively + shipping. PPE ships to Canada for $44 but Demonworks for the cooler doesn't but ships for free to a US address. PPE will ship to a US address for $14.

My biggest concern would be if I ever do have a failure that needs warranty work, they would refuse it because of these mods. Is there a precedent for this type of claim?

I would be inclined to use the 4 qrt extra capacity pan, if it didn't hang down too much more than stock.

 

[Mooseman]

My only problem with it is that it doesn't use an extended oil filter to reach the bottom of the pan. What's the point of the extra capacity if it can't use it?

My biggest beef is no dipstick. Apart from checking the level, you can also see the condition of the fluid.

Speaking of the filter, did find this article explaining how it works. Pretty cool that they now filter for finer particles.

10R80/10L90 Ford & GM Ten Speed Unique Filter System

This design will allow enough fluid volume to the pump during a cold start up and quickly prime the pump. As the fluid heats up (low viscosity), the Thermal Plate will move towards a slight ledge along the topside of the filter housing.

www.transmissiondigest.com

 

[H82looz]

I’m really hoping PPE or someone comes out with some sort of fill tube/dip stick for these transmissions…