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Rear differential question

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Old Feb 15, 2025 | 06:49 PM
  #1  
Gone Johnson's Avatar
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Joined: Jan 2013
Posts: 128
From: American Canyon, California
Rear differential question

Hello all, I'm sorry if this is a super repeated question on here.
Just replacing some axle bearings / seals on my one legger 10 bolt rear end.
I'm pretty sure since I have an 11 inch cover and the triangular shaped lugs at the bottom, I have the 8.5 in model.
I've always known that I've had Highway gears- As I can go 250 mph eventually, but this car is no quarter mile racing machine.
I never saw a number stamped on the rear end housing, I looked once. Today, I finally saw these numbers on the ring gear.
41A15 GM AYH271
If I divide the 41, by 15, it equals 2.73.
I know it seems no brainer, but does this mean I have 2.73 gears?
Just trying to make sure, I'm pretty sure I already answered my own question, would like someone to change my diaper here.

Thanks!
Old Feb 15, 2025 | 07:03 PM
  #2  
2qwk4u442's Avatar
Old'S-Kool
 
Joined: Sep 2024
Posts: 112
From: North Texas
Yes you've got it. 41 divided by 15, = 2.73
Thats your ratio
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