Curt
Sometimes when I close my eyes, I can't see.
Long story short, I'm fed up with the inadequate transmission cooling these trucks come with. This suburban has killed 3 4L60e's and almost killed the 4L65e this past weekend. The cooling system is not up to par.
Towing our 21 foot ski boat this past weekend for the first time since 2005, the trans temp reached 250F+ (pegged out the gauge and I'm assuming it hit 270F). Transmission started slipping badly and puked trans fluid once I made it to the lake. It still registered fluid so luckily I was able to limp her back home with the boat. Obviously I let it cool down and enjoyed a day on the lake prior to driving home. It reached 250F+ for minimal amounts of time on the way home.
I know there is the Tru-Cool M7B that will replace the factory trans cooler, but I have an odd suspicion that it will not meet my cooling expectations. Also, people on the forum have noted to check the lines and radiator to ensure there is no blockage, I will do so once I tackle the project.
For now, I am making a parts list to have one of the coolest 4L65e's out there. Here's the current list:
Also, the only video I found of a GMT400 getting the 40k AND keep AC is this:
Towing our 21 foot ski boat this past weekend for the first time since 2005, the trans temp reached 250F+ (pegged out the gauge and I'm assuming it hit 270F). Transmission started slipping badly and puked trans fluid once I made it to the lake. It still registered fluid so luckily I was able to limp her back home with the boat. Obviously I let it cool down and enjoyed a day on the lake prior to driving home. It reached 250F+ for minimal amounts of time on the way home.
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I know there is the Tru-Cool M7B that will replace the factory trans cooler, but I have an odd suspicion that it will not meet my cooling expectations. Also, people on the forum have noted to check the lines and radiator to ensure there is no blockage, I will do so once I tackle the project.
For now, I am making a parts list to have one of the coolest 4L65e's out there. Here's the current list:
- 4L60e/65e deep pan: https://www.amazon.com/gp/product/B002U6ELS4/ref=crt_ewc_title_dp_2?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
- Gasket and Filter
- ACDelco Dexron VI
- Tru-Cool 40k
- Fittings to adapt OEM trans cooler lines to 40k lines: https://www.amazon.com/gp/product/B0049OHUGU/ref=crt_ewc_title_dp_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
Also, the only video I found of a GMT400 getting the 40k AND keep AC is this:
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