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Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake

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Specs
Sold in Quantity:
Kit
Finish:
Natural
Rotor Diameter:
11.25
Bolt Pattern:
Dual: 5 on 4.5"/4.75"
Minimum Recommended Wheel Diameter:
15 Inch
Caliper Finish:
Natural
Rotor Construction:
Vented
Material Type:
Cast Iron
Caliper Pistons:
Single
Rotor Location:
Rear
Rotor Shape:
Round
Thread Pitch:
7/16"-20
Hardware Included:
Yes
Parking Brake Provision:
Yes
Drilled:
No
Slotted:
No
Rotor Thickness:
1.00
Rotor I.D.:
2.78
Rotor Backspace:
2.30
Notes
Works with 8" Ford, and new and old style big bearing ford 9" using 3/8" retaining bolts.
Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake
VIDEO
Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake

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Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (15)

Q & A (25)

What's in the Box

Info

As featured on Classic Truck’s Week to Wicked. Watch the transformation here!

If you dont want to spend an arm and a leg on a rear disc brake kit and still have to weld the bracket on, weve got you covered. This kit includes bolt-on caliper brackets, 11-1/4" vented rotors, 78-88 GM emergency brake calipers, brake pads and hardware.

  • Fits both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
  • For Ford passenger car axles ONLY 
  • Fits axle with maximum flange diameter of 6-1/4" O.D.
  • For 15" and larger wheel applications ONLY

NOTE: This bolt on brake kit is designed to be used on 8" and 9" housings using 3/8" retaining bolts. If you want to use it on a 9" housing with 1/2" bolts, you will need to use the 3/8" hardware to do so. Fits "old" and "new" style big bearing (3.150" bearing O.D.) Ford housings and with axle offsets of a minimum 2-3/8" to 2-1/2".

Axle Flange Identification Chart (GIF)

910-31921 Instructions (PDF)

Caliper Adjustment Instructions (PDF)

Item Details

With emergency brake calipers threaded to accept 7-16"-20 banjo bolt.

Application

  • "Old-style" big bearing 9" Ford axle
  • "New-style" big bearing 9" Ford axle
  • 8" Ford axle
  • Axle housings with minimum axle offsets of 2-3/8" to 2-1/2"

This kit will NOT work on pickup housings or the 50's 9" housings as they only have about 2" backspace. The exception would be the late 50's station wagon rear ends.

When using with a Currie Axle with an o/d register of 2.795", the rotor is included in this kit with an i/d register of 2.78" and therefore will need to be machined by increasing the hole diamter in the rotor to match the Currie axle spec of 2.795"

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