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Re: 63' Chevy C30 Dually Rear End Identification
The only way you are going to get a gear higher than 4:11 is to change the entire differential. Personally that's what I would do regardless. The last time I bought the one pinion bearing it was about $240. And that was over 25 years ago. Finding a 10.5" 14 bolt with 3.73 gears isn't too difficult. With a Dana 60 or 70, you can get 3.54 gears.
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