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1978 F-150 Rear ?s

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Old 03-21-2005, 08:26 AM
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1978 F-150 Rear ?s
OK, I may be bable to get a 1978 Ford 9" rear end out of a Ford F-150. Any clue on the spline count/bearing size that was typical for this year. I tried wading through google search and a search on here, but was unable to find anything.
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Old 03-21-2005, 07:52 PM
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should be a 31 spline. Carrier bearing is 2.89
 
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Old 03-21-2005, 10:36 PM
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It depends on the GVW of the truck and the original engine. Some were 28 and some were 31. Most V8's were 31 spline.
 
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Old 03-22-2005, 12:09 AM
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78 is 50/50 28 or 31 no way to even geuss.

79 would definatly be a 31
 
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