Need Some Differential Help

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1969340dart

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I am changing a set of 3.55 gears from an 489 case o 4.88 gears.The 3.55 gear set has a fine spline yoke and the 4.88 gears have a 10 spline yoke.What I need to know is are all mopar 10 spline yokes the same or does it take a special one for the 489 case.Where is the best place to get one from at the best price. I know that there are two different size U joints the 7260 and 7290,I have the 7290 with the fine spline so I would need the 7290 with the 10 spline.Any help will be greatly appreciated.

Thanks

Bobby
 
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