WTB ring gear and pinion 1966 olds 98 auto

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Old June 23rd, 2016, 04:42 AM
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WTB ring gear and pinion 1966 olds 98 auto

WTB ring gear and pinion mine is worn to bad to reuse and i am stuck

1966 olds 98 auto
12bolt ring with 10 bolt cover
Number on ring gear 40 13 GM 3 66NDA
Letter on diff tube QM = 3.08 40:13
9.375 Olds 'O' TYPE REAR
Let me know if you have anything that will work or where I can get one
Thanks
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Old June 25th, 2016, 06:23 PM
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Check the application but I have an NOS unit. The box is marked p axle. Group 5.529 part number 9781153. It is marked as 65 full size and 66-67 98. If there is a stamping or other distinguishing mark to look for I can.
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Old June 25th, 2016, 06:26 PM
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Thanks
I actually bought a set today but if they don't work out I'll get ahold of you
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Old June 26th, 2016, 09:16 AM
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Originally Posted by deaddds
Check the application...... 9781153.....
My book shows that part# as '67-'70 2.73:1 ratio, with 7/16" ring gear bolts. Keep in mind, this book only goes back to 1967.

Last edited by ROCKETMAN269V; August 2nd, 2016 at 08:47 AM. Reason: brain fart
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Old July 24th, 2016, 01:15 PM
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I believe the GM part number for a "O" axle 3.08-1 ratio should be 230036 which was used from 1966-1970 Oldsmobiles
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