Not a ln idi specific question, but more of a bricknose question

[turbo_h8er]

I have a 1988 ford f250 with the 7.3 idi, zf5, and full floater single rear wheel rear axle. It's also a 4x4.
What size rear brake shoes do I have?
You can get 2.5, 3, and 3.5 inch rear shoes and I have no way to go all the way to the truck to measure them until this weekend due to work.
I would like to order shoes, wheel cylinders, and hardware and have the stuff here by Sunday or Monday because those are my off days.
Thanks.

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[Nero]

I don't think there's really a way to tell without pulling the drum off and looking. I can say from experience that the 2.5 is the most common one.

 

[Black dawg]

Pull and check to know for sure. Ford wasnt consistent, and these trucks have been around long enough to have all kinds of stuff switched around.

 

[XOLATEM]

Now is the time to bet on what you'll find. I got a left handed clutch cylinder feed hose riding on that you have...uh...just a minute...gotta consult the crystal ball....

I'm gonna go with 3 inch because I want you to have better brake life than standard.

Any takers..?

 

[Black dawg]

3 inch is what I see on most of these with single wheels.

 

[FrozenMerc]

By both, return the set that doesn't fit next week.

 

[Black dawg]

Wheel cylinders are specific to shoe width also.

 

[ROCK HARVEY]

I have the same truck as you except mine is an 89, and mine took the 3 inch shoes. I wonder if the 2.5 inch brakes are for the semi-floater rear ends, and the 3.5 are for duallies. That would make sense to me, but I don’t know for sure. I do know that the 1997 SRW F250 rear end I swapped in also took 3 inch brakes.

 

[IDIBRONCO]

I have the same truck as you except mine is an 89, and mine took the 3 inch shoes. I wonder if the 2.5 inch brakes are for the semi-floater rear ends, and the 3.5 are for duallies. That would make sense to me, but I don’t know for sure. I do know that the 1997 SRW F250 rear end I swapped in also took 3 inch brakes.

You might be mostly right. I've seen a E350 van that took the 2.5" brake shoes.

 

[u2slow]

Slide off the drum and measure the machined width.

Dodge uses 12" Bendix drums also, and you can put in many sizes of wheels cyls, and either width shoes in there.

Edit: 3.5" should be for the dually.

 

[Rondo]

The larger of everything should be for the ambulance package. the 3 in should be for the 250 and 350.