9 inch posi?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Ahhhhh, yes true. Spline Count! Thanks for correcting me.
Grandpa, if this seems intimidating, don't sweat it. It's not. You can get your gear ratio from the door tag. You can measure the universal joint caps and yoke length.
As for spline count, the only way I know to get that is to pull one axle shaft and count the splines. It's pretty easy but be prepared for the axle bearing to come apart. I would never put an old bearing / seal unit back in there anyway.
Grandpa, if this seems intimidating, don't sweat it. It's not. You can get your gear ratio from the door tag. You can measure the universal joint caps and yoke length.
As for spline count, the only way I know to get that is to pull one axle shaft and count the splines. It's pretty easy but be prepared for the axle bearing to come apart. I would never put an old bearing / seal unit back in there anyway.
1974/79 with 9 inch: TWO different types of axle bearings. One is the large ball bearing type (also used 1961/73 & 1980/86), the other is a tapered roller bearing/seal combination.
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