You might be confusing terms. Twin I Beam is a 2WD suspension, and it's been many decades since Ford put a solid axle in a 2WD.

So, assuming you are talking about 4WD, all F-150 and F-250 '80 - '96/'97 were Twin Traction Beam. F-350s were TTB from '80 to (I think) '85, and solid axle from (I think) '86 - '97.

The solid axle in your '96 F-250 is not stock (but it is an easy swap).

 

 

4x4 F350's received the Dana 60 front axle, F250's got the TTB Dana 50. Neither received the twin I beam, that was used on 2wd trucks(if it was even still called that). Someone installed the axle on your truck.

 

Count the bolts on the front cover/compare cover shape.

 

 

Actually a lot of 4WD F-250s had the Dana 44HD TTB. (And older F-350s had TTB too, but not in the '87 - '97 years this forum is about)

Yes, the 2WD suspension was still the Twin I Beam though these years. In fact, my 2015 E-450 motorhome has twin I beam suspension.

 

What is the difference between a standard Dana 44 TTB and a Dana 44HD TTB?

 

Swapping an axle and badges will not make a truck into an F350. This is tied into the VIN code and you could get yourself into quite a bit of trouble should you decide to load this truck to F350 specs.

Still, there is no harm in faking it, just remember you have an F250.

 

I'm not sure. Dana 44 was used in F-150s and Broncos, Dana 44HD in F-250 and F-250HD (except for the F-250HD that got Dana 50s).

I know that the 44 had a 5 bolt pattern for the wheels while the 44HD had 8 (which really isn't that significant since that's just how the hubs are drilled). The 44HD might have bigger brakes? I don't think there was any difference in the diff, axle shafts, spindles or wheel bearings (but I could be wrong there). I sort of suspect that it was a distinction without much difference because F-250 buyers wouldn't want to hear that they were getting a 1/2 ton front axle (which really would be nothing new, because until the 4WD F-350s came out in ~'78 there wasn't anything stronger than a Dana 44 front axle in pickups).

By the way, I've heard that F-250s would get the Dana 50 if they were SuperCabs, crew cabs, or if they had a snowplow package, and a Dana 44HD otherwise. But in Ford form, there probably was more flexibility than that, and you simply have to look to see what your truck has.

 

Didn’t the F-Superduty have a solid axle? They were only 2 wheel drive.

 

Solid I beam axle(think tractor trailer front axle)

And the 99+ F450 and F550 2wds are solid axle(looks just like a 4wd axle but just a straight pipe from knock to knuckle with no pumpkin)

 

That really means nothing since the D44, dana 50 and dana 60 all use 10 bolts on the front cover

 

Do they all have the same thing stamped where "Model Number" is on the diagram?