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Old 06-20-2020, 03:42 PM   #1
Muskiehunterman
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10L90 vs 10L80 Gear ratio.

I am moving from a 2020 Camaro SS to a 2021 1LE with the 10 speed transmission. Where is the 10L90, 2.85 ratio different than the 2.77 ratio of the 10L80. I understand the duty rating difference, I am just having trouble finding all the gear specs to compare. Any help would be greatly appreciated.
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Old 06-22-2020, 10:18 AM   #2
TheRealJA105

 
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The SS1LE is not going to get the 10L90, it will have the same 10L80 as your current car and the gear ratio you are referring to is the rear differential ratio not the transmission.
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Old 06-22-2020, 08:09 PM   #3
Muskiehunterman
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Got my equipment group ordering info which indicates (A1Y ), the 2021 1LE gets the 10L90/ HRD 2.85 rear axle ratio. Put my order today with dealer so it is ready to go when orders start being accepted later this week.

Thanks for feedback!
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Old 06-22-2020, 08:40 PM   #4
mlee
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Here's what GM authority showed. All the same but I'm not sure I trust the 10L80 numbers.


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