I know there have been several articles 0n 9inch swaps for 1950 F1's. I would just like to know the best years to use for the simplest conversion. Any help will be greatly appreciated. Thanks

 

Max - this is from the sticky thread "48/60 Forum Tips, Tricks, How To's"


1948 through 1960 Ford F-1 and F-100 Rear Axle (differential) Swaps | Ford Trucks

 

9" out of a pre-73 F100. Just watch out for the 9 3/8" unit that are in some - looks similar but parts do not interchange.

 

9" w/a 9 3/8" ring gear has 31 spline axle shafts and Traction-Lok. Will be found in some 1968/72 F100's.

1973: Ford increased the width of the inner frame rails behind the cab from 33 1/2" to 37 1/2" .. this is why you don't want to use a 9" from 1973 and later.

 

Hi Guys, Thanks for the Info, But how do You Recognize the difference between the9 in and the9 3/8?

 

Not to be a smart a$$ Max, but do a site or internet search. Otherwise someone here would have to do it for you and then post links to the same things you can look up.

When you have problems the guys here will help but sometimes these threads are tiring when it has been asked and answered a couple hundred times.

 

To save Max the trouble: the 9 3/8 carrier's top horizontal rib is curved or "bent" at one end, the 9" is straight.
You find the pictures if you still unsure!