Rear end identification and parts.
January 8th, 2022, 02:22 PM
#2
Out of Line, Everytime😉
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 8,992
Yes, that should be the factory Type O 8.5" differential. Only 3.42 and 3.90 gears are available aftermarket and need the 3.08/3.23 carrier to use them. The aftermarket posi are modified 8.8 Ford units. If you are Ok with 3000+ rpm highway cruising, depending on tire height and highway speed limits, you are good to go.
January 8th, 2022, 02:28 PM
#3
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Join Date: Jul 2018
Location: Sweden
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Yes, that should be the factory Type O 8.5" differential. Only 3.42 and 3.90 gears are available aftermarket and need the 3.08/3.23 carrier to use them. The aftermarket posi are modified 8.8 Ford units. If you are Ok with 3000+ rpm highway cruising, depending on tire height and highway speed limits, you are good to go.
January 8th, 2022, 02:45 PM
#4
Out of Line, Everytime😉
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 8,992
No, different thickness and I believe 31 spline vs 28 spline axles. A 3.42 is a good ratio, depends what you are comfortable with and where you drive the car. I want overdrive with that gearing, just my preference as everything is a long trip on the Canadian Prairies. Good luck.
January 8th, 2022, 02:53 PM
#5
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Join Date: Jul 2018
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No, different thickness and I believe 31 spline vs 28 spline axles. A 3.42 is a good ratio, depends what you are comfortable with and where you drive the car. I want overdrive with that gearing, just my preference as everything is a long trip on the Canadian Prairies. Good luck.
If I do find a 3.08 axle will the aftermarket diff fit right in?
January 8th, 2022, 03:32 PM
#6
Out of Line, Everytime😉
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 8,992
Yes, that is the carrier they chose for whatever reason for the aftermarket modified Ford 8.8 posi in the aftermarket. This only pertains for the 12 bolt cover, 10 bolt ring gear Type O 8.5".
January 9th, 2022, 07:52 AM
#7
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