Ordering Caliper 2.5 or 3.5

[lothar863]

I tried searching but it kept giving me an error so sorry if this has been asked and answered before.

I just got to work and was going to order some front calipers, rubber hoses, and pads.

Went to rock auto and i am seeing options for 13" x 3.5" and 13" x 2.5"

I dont have the truck with me(no brakes) and would really like to get them ordered right now.
I also don't have a shot of the glove box sticker with me.
Is there any way to tell which i need?

1989 r3500 crew cab dually 7.4 FI

FYI i was looking between these 2
CARDONE 18P4167
or
ACDELCO 18FR650

 

[Craig 85]

1 Tons have 13x3.5" rear brake shoes. I bought the Cardones from Rockauto too.

You must be registered for see images attach

 

[bucket]

1 Tons have 13x3.5" rear brake shoes. I bought the Cardones from Rockauto too.

You must be registered for see images attach

ThermoQuiet pads?

 

[SquareRoot]

1 Tons have 13x3.5" rear brake shoes. I bought the Cardones from Rockauto too.

You must be registered for see images attach

1 Tons have 13x3.5" rear brake shoes. I bought the Cardones from Rockauto too.

You must be registered for see images attach

Never seen a rear axle with lockout hubs before. Novel!

 

[Craig 85]

Never seen a rear axle with lockout hubs before. Novel!

That's a picture of the front axle. The front calipers are different depending on which rear brakes you have on a 14 bolt.

I've seen lock out hubs on rear axles in the magazines years ago. That way you can flat tow them and not use a trailer. Warn actually made a kit for the Dana 60 for a while. They don't sell them any more. From reading later articles, it was a weak set up due to them using cast aluminum hubs.

http://www.fourwheeler.com/how-to/transmission-drivetrain/154-0910-early-dana-44-full-floater-
axle-kit/
http://www.tricountygear.com/2012/11/02/warns-rear-full-floating-dana-60-kit/