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Author Topic:   10 bolt rear numbers
Dirt Full Roller

Total posts: 71
posted June 18, 2003 09:28 PM  
Just pulled the rear out of my 73 Chevelle. Can anyone tell me what these numbers mean. On the ring gear are these numbers: 3984825 15:41(the first 1 is only half stamped so I'm not certain about it) 72 12. And on the carrier? the part the ring gear bolts to is GM41. I found the build sheet and it says a 2.73 gear. I'm hoping this is what it is because I ordered 4.11 gears today and have to have a 2.73 or lower carrier.

Dirt Forum Champ
Total posts: 1019
posted June 18, 2003 09:36 PM  
Yes, a 15:41 gear is a 2.73 ratio. It will work with the higher gear sets such as the 4.11 that you intend to use.


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