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Ford 9 Inch Bolt-On Rear Disc Brake Kit

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Specs
Sold in Quantity:
Kit
Rotor Diameter:
11.25
Bolt Pattern:
Dual: 5 on 4.5"/4.75"
Caliper Finish:
Natural
Rotor Construction:
Vented
Caliper Pistons:
Single
Rotor Location:
Front
Rotor Shape:
Round
Hardware Included:
Yes
Drilled:
No
Slotted:
No
Rotor Thickness:
1.00
Notes
Includes rotors, pads, calipers, caliper brackets, and hardware. Works with 8" Ford, small bearing 9" Ford, and new and old style big bearing Ford 9" using 3/8" retaining bolts.
Ford 9 Inch Bolt-On Rear Disc Brake Kit

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (8)

Q & A (20)

What's in the Box

Info

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 metric style 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)

910-31902 Instructions (PDF)

Item Details

With non-emergency brake calipers.

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 diameter in the rotor to match the Currie axle spec of 2.795"

Customer Reviews

Rated 4.5 out of 5 by 8 reviewers.
RATING BREAKDOWN
8 reviews
5 Stars
5
4 Stars
2
3 Stars
1
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

durty
Verified Purchaser
Verified Reviewer
North Dakota

looks quality only

March 01, 2016
My review is on looks only the quality on the brake parts don't look thin or cheaply constructed.
Yes, I recommend this product.
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Paul
Verified Purchaser
Willis, TX

Plan to buy this for my other car.

December 20, 2015
Great value and quality. Instructions are a little vague, even with photos.
Pros:
  • Great price
  • TOP Quality
Cons:
  • instructions are vague
Yes, I recommend this product.
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bob
Verified Purchaser
Verified Reviewer
fraser mi

I did not get any brake hoses or fitings with kit

September 02, 2015
When you buy a kit you should have all the parts you need to install.
Yes, I recommend this product.
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pokey
Verified Purchaser
west palm beach fl.

I would buy this product again.

August 04, 2015
when useing currie cut to fit 31 spline axels, the rotor center hole must be open up aprox. 1/16 inch to fit over the axel center.
Yes, I recommend this product.
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Big Al
Verified Purchaser
Jacksonville, Ar.

Disc Brake kit for rear end............Great Kit.

June 09, 2015
The Kitt works good on the 1923 T I am building, and recomend it for any rod.
Pros:
  • Simple And Very Easy To I
Yes, I recommend this product.
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topolinogasser
lancaster pa

works great

June 30, 2014
Nice inexpensive way to put rear discs on a car. Looks a little more old style that Willwood and it will work with a 15" rim too.
Yes, I recommend this product.
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ducky47
San Jose, CA, USA

super easy to install

December 26, 2013
looking for an easy kit for my T project. this kit was so easy to install plus it looks great! I plan to use this kit on another project i am working on
Pros:
  • the pros are that there no cons!
Yes, I recommend this product.
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radracr
Verified Purchaser
Houston, Texas

9 Inch Ford Bolt On Brakes

April 02, 2011
For my application I converted the housing ends of my 8.5" GM 10-bolt to a Moser Circle Track Axle Package...so I needed an easy to install package...this is it!!...and, the guys at Speedway were able to line me up with all the other pieces needed to complete the install...even with my application it was an amazingly simple install...highly recommended...
Pros:
  • Easy To Install
  • Decreased Stopping Distance
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

20 questions : 22 answers

1 answers

I have the rotors, pads, calipers and was going to weld the brackets but could I buy the caliper brackets and hardware separately?

Larry48
Canfield, OH 44406, USA
December 19, 2014

I have the rotors, pads, calipers and was going to weld the brackets but could I buy the caliper brackets and hardware separately?

Answers

December 20, 2014
EricM
Yes we offer the brackets separately. The brackets are part number 91031981 and you will also need bolt kit 91031981-2. If you need caliper slide bolts also they are part number 8352300542.
1 answers

will this kit work on a 14'' rim

Darkpurple66
September 11, 2014

will this kit work on a 14'' rim

Answers

September 12, 2014
EricM
No this kit requires 15" or larger wheels.
1 answers

will this kit work on a Lincoln Versailles 9" Thank you Gary

hopper
July 17, 2014

will this kit work on a Lincoln Versailles 9" Thank you Gary

Answers

July 17, 2014
EricM
The Lincoln Versailles rear ends have the 9” old Ford housing flange pattern most of the time that would work with the brake kit. The axle offset of the kit is for either 2 3/8" or 2 ½” of which you will need to verify. If less than the 2 3/8" it would require modification on the installers part as needed.
1 answers

Are the rotors machined for 5 x5.5 axles? I have a 1966 Bronco and I want to add disk brakes to the 9 inch rear. The way i read the discription left me wondering if the rotors would work with 5 x 5.5 bolt pattern axles

waverous
Aurora, CO, USA
July 04, 2014

Are the rotors machined for 5 x5.5 axles? I have a 1966 Bronco and I want to add disk brakes to the 9 inch rear. The way i read the discription left me wondering if the rotors would work with 5 x 5.5 bolt pattern axles

Answers

July 07, 2014
EricM
No this will not fit a 5 on 5.5" bolt pattern. Sorry I do not have a rotor that fits your application.
1 answers

Any special tools needed to install this kit?

Papahank
Orlando, FL
March 25, 2014

Any special tools needed to install this kit?

Answers

March 25, 2014
EricM
Basic hand tools are all that is required to install this kit.
2 answers

will this kit work on the 9" found on the back of (1961-1967) econolines?

herosandwich
milwaukee, wi
November 11, 2013

will this kit work on the 9" found on the back of (1961-1967) econolines?

Answers

December 27, 2013
ducky47
this kit should fit on any 8" or 9" rear end
November 12, 2013
Jason
The axle flange and offset on many of the Econolines was the pickup version which makes it not applicable for our bolt on disc brake kit. On our website enter the part number 91031902 in the search window, click search, click on the first photo for the main page and once there scroll down to the purple print axle flange identification and the bolt on kit works on both the early and new style Ford rear ends with 2 3/8 or 2 ½ axle offset. Compare to your application to verify fit.
1 answers

brake drum register size what size is the hole in the center of the rotor. I am using aftermarket axles with a brake drum register of 3.060" o.d.

darylscott
April 02, 2013

brake drum register size what size is the hole in the center of the rotor. I am using aftermarket axles with a brake drum register of 3.060" o.d.

Answers

April 03, 2013
Jason
The rotor id is 2.78" on this 9" bolt on rear disc brake kit. This kit will only work on axle off sets in the range of 2-3/8" to 2.5". Some early 50's Ford rear axles have less than 2-3/8" off set.
1 answers

Will these work on the Tribute T with the 9" Ford?

grump
Arkansas, USA
December 06, 2012

Will these work on the Tribute T with the 9" Ford?

Answers

December 07, 2012
Jason
Yes, this disc brake kit will work on the 9” used in the Tribute T as well as our other T buckets and hot rod Chassis offered by Speedway Motors.
1 answers

What is the part number of the brake hoses for this kit? Thanks, Jim

Jim
Bethpage N.Y.
January 06, 2011

What is the part number of the brake hoses for this kit? Thanks, Jim

Answers

January 11, 2011
Bill
Use the part number: 617-8564 brake line kit to hook up your rear brake lines.
2 answers

will these work with 15"x12"wide rims?

robert of mtz
martinez ca
July 23, 2011

will these work with 15"x12"wide rims?

Answers

December 27, 2013
ducky47
it should. I have this kit with 15x10 rims with no problems
July 25, 2011
John
These rear brake kits feature 11 ¾” diameter rotors and work with many disc brake applicable wheels. With the addition of the caliper to the diameter of the rotors you will need to check the I.D. of your wheel where the caliper will meet to verify you have at least 14” of available space.
Page 1 of 2

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