What is the difference?

[kc0stp]

How far the axle flange sticks out from the brakes/wheel

 

[The Warden]

How far the axle flange sticks out from the brakes/wheel

X2. Look at the pics below:

Full-floating axle:

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Semi-floating axle:

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[NO_SPRK]

hd trucks 101 here

 

[gatorman21218]

Ok so how can you tell between a semi full floater and a full floater rear axle?

look at the pictures but the full floater has the 8 bolt hub sticking out and the semi is flush with the rim with the almost locking hub looking thing

 

[IDIDieselJohn]

They were very rare, but I've seen at least one light-duty F-250 that had a factory semi-floating axle (I think it was a Dana 60; it was an '83 or '84 so it was definitely a Dana axle) and a diesel. I wish I had taken pictures of it, but it at least used to belong to a guy on here who doesn't post very often. His handle is "brians". It was also one of the few trucks I've ever seen that had dealer-installed air conditioning; had the non-a/c heater box with the a/c setup separately and underneath it (IIRC), and a York compressor.

I'm not 100% certain on this, but I think sometime between '87 and '91, the Dana 50 TTB became standard on any diesel F-250...I've only seen Dana 44's on slant-nose trucks.

FWIW...

My 1990 F250 Diesel sits on a D44HD.

 

[NO_SPRK]

I've never seen a d44 87+ truck in California