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8L90 Transmission Operating Temperature

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Old 03-23-2023 | 11:29 PM
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So what is the reason to even take it to a shop? Is it having trouble?
Old 03-23-2023 | 11:37 PM
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Merged duplicate threads. Please do not start multiple threads for the same issue.
Old 03-23-2023 | 11:46 PM
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LOL just happened across this thread over at SilveradoSierra.com:

. . . by someone named TruckinCountry.

It looks like Z15 came to the same conclusion in this post.

I'm still curious: What'* going on with it?
Old 03-23-2023 | 11:48 PM
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Merged another duplicate thread. Please do not start multiple threads for the same issue.
Old 03-23-2023 | 11:51 PM
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Originally Posted by carfixer007
WHY THREE THREADS?
Or four including the one at SilveradoSierra.com
Old 03-23-2023 | 11:55 PM
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This thread is pretty messy now that all triplicate threads have been merged into one. Summary:

Originally Posted by TruckinCountry
I have a 2016 Chevrolet Silverado V8 5.3 pickup with the 8L90 transmission. What operating temperature should I be running? Just looking for feedback on standard operating temperature for daily driving with no load. Any feedback regarding transmission operating temperature is greatly appreciated. Would like to hear from some who run the 8L90 as well.

Background: I got a transmission shop trying to tell me that 120* and under is normal operating temperature for a transmission with the bypass valve. Not buying it, so just gathering some information to back me up to provide when I pay them another visit. Fell free to provide your feedback on that claim as well.
Originally Posted by CathedralCub
From pages 374 and 375 of your owner'* manual:



. . . so 160F-200F is normal operating temperature.
Originally Posted by CathedralCub
So what is the reason to even take it to a shop? Is it having trouble?
​​​​​​​
Old 03-24-2023 | 12:38 AM
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Originally Posted by CathedralCub
From pages 374 and 375 of your owner'* manual:



. . . so 160F-200F is normal operating temperature.
For checking fluid levels yes but I am not inquiring about temperature at which to check fluid levels. I'm inquiring about normal operating temperature, two different things.
Old 03-24-2023 | 12:42 AM
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Originally Posted by CathedralCub
So what is the reason to even take it to a shop? Is it having trouble?
Look up the class action suit on GM 8 speed transmissions which includes the 8L90. Which my truck runs. Yay me. Lol
Old 03-24-2023 | 12:46 AM
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Originally Posted by CathedralCub
Or four including the one at SilveradoSierra.com
Different forums, different people, different feedback which means more information. The more information the better, that'* what I'm after.
Old 03-24-2023 | 12:49 AM
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Originally Posted by CathedralCub
This thread is pretty messy now that all triplicate threads have been merged into one. Summary:





They were all under different categories, again reach more and different people. No real helpful information so far so I will probably delete them all tomorrow and repost.


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