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Is AMSOIL ATF preferred for the 6L80E?

Marztian
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flyingfool Senior Enthusiast

flyingfool

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my next big upgrade to the transmission will be dropping the temp threshold window for the engine cooling fans. This is another factor in maintaining heat resistance. even as i run a 175 stat, stop and go traffic causes the engine to get up to 205 F , its not til i'm on the highway that i can cool the transmission by utilizing the radiator heat exchanger. i'll let you know my discoveries.  this weekend i drove 80 miles at 70 mph, nonstop it held a constant 125 F all the way out of town. with NO aux trans cooler! just 1/8" restrictor in the bypass system

 

 

funny thing is my 2012 Sierra 2500HD with factory tow package also operates at 120-125F  and that truck has a monster trans cooler from the factory

Edited by flyingfool
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Z45
Z45

The trans shop guy doesn't want you to use AMSOIL because AMSOIL saves transmissions and he is in the repair business. The use of AMSOIL ATF will not void any factory warranties. Anyone who says that

Grumpy Bear
Grumpy Bear

I use Red Line D6 in my 6L80E. Have for about 75,000 miles now without issue one. Know what Red Line D6 and AMSOIL have in common? They share the same base oil chemistry. PAO/POE.    It isn'

Black02Silverado
Black02Silverado

No problems with using the AMSOIL fluid.  I have used it from 10k miles to 200,000 miles in my 2002's transmission with no issues and I have used fluid analysis to back it up.  It is in every vehicle'

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