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Old 06-28-2020, 05:57 PM   #6
rotorwrench
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Location: San Antonio, Texas
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Default Re: 1955 Ford ranch Wagon/ Differential Question?

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I guess it depends on what it came out of from 1957. The 9-inch looks more like the older Ford car unit. Dana 44 rear axles should have been original for station wagons but some cars were coming with the odd Dana 45 in that time frame. If it has a 9-inch, it's pretty easy to ID it with the removable 3rd member that connects up at the front of the housing. If it has a pan that bolts on the back it could be a Dana 44 since Ford was still using them in Pickups in 1957. The D44 will have a casting mark under the right side rear bulls eye at the junction of the axle tube on the housing.

A little backlash is normal in the gears but a lot is not. The pinion bearings might be on their last leg. There is plenty of stuff available for a 9-inch if that's what it is.
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