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A D44HD will be standard in a F250 but its only HD because of the brake system. Nothing is stronger (axles carrier gear etc) NO D44 will have kingpins. Only D60s will have them.
1969 – 1975 Large Kingpin. "highboy" The true Heavy Duty Dana 44
Think Softball sized closed knuckle
Just for Fun...
1976-77.5 Open knuckle F250 axle
The 1969 – 1975 Large Kingpin is the only True Heavy Duty Dana 44.
NOT because of the Hubs, but yes the 76-77 hubs on all F250's are the same as the Heavy Duty Dana 44's.
It's because of the larger u-joint. The 69-75 HD Dana 44 axle run a 5-86x u-joint
Top shaft is a 5-86x u-joint style axle shaft, bottom is a 5-297x style shaft. This heavy duty 5-86x u-joint axle shaft does not fit in a Ball Joint Dana 44.
so the 69-75 dana 44 axles are better? the have the larger king pin? or is that a u joint? im kinda confused here.
whats the diff between a knuckle,king pin, ball joint, and a u joint?
No, the 69-75 have drum brakes from the factory. The 76+ are disc, much better.
However the HD Dana 44 has a strong axle shaft and U-joint for 69-75. But they are rare, so not worth switching to.
Knuckle = 44
Kingpin - Not shown in diagram. See pics below.
Ball joint = 36
U-joint = Middle of 48